395 lines
14 KiB
Rust
395 lines
14 KiB
Rust
//! Indexing-path microbenchmarks.
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//!
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//! Same convention as `benches/search.rs`: each group pairs two ways of
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//! doing the same work, measured together.
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//!
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//! ```text
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//! cargo bench -p quicksearch-core --bench index
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//! ```
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mod corpus;
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use divan::Bencher;
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use quicksearch_core::{mime, textenc};
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fn main() {
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divan::main();
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}
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/// Compressing an extracted document: pure CPU, done by the writer as each
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/// row is stored. `batch_*` measures a whole walk batch of small bodies.
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mod zstd_encode {
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use super::*;
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/// Level 3, matching `db/repo.rs`'s `ZSTD_LEVEL`.
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const LEVEL: i32 = 3;
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#[divan::bench(args = corpus::SIZES)]
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fn encode_all(bencher: Bencher, size: usize) {
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let text = corpus::text(size, 4).as_bytes();
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bencher.bench(|| zstd::encode_all(divan::black_box(text), LEVEL).unwrap());
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}
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#[divan::bench(args = corpus::SIZES)]
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fn bulk_reused(bencher: Bencher, size: usize) {
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let text = corpus::text(size, 4).as_bytes();
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let mut enc = zstd::bulk::Compressor::new(LEVEL).unwrap();
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bencher.bench_local(move || enc.compress(divan::black_box(text)).unwrap());
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}
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/// One walk batch of typical documents. All compression together is
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/// under 1% of a cold run.
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const BATCH: usize = 500;
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#[divan::bench]
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fn batch_encode_all(bencher: Bencher) {
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let text = corpus::text(1 << 10, 4).as_bytes();
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bencher.bench(|| {
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(0..BATCH)
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.map(|_| {
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zstd::encode_all(divan::black_box(text), LEVEL)
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.unwrap()
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.len()
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})
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.sum::<usize>()
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});
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}
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#[divan::bench]
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fn batch_bulk_reused(bencher: Bencher) {
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let text = corpus::text(1 << 10, 4).as_bytes();
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let mut enc = zstd::bulk::Compressor::new(LEVEL).unwrap();
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bencher.bench_local(move || {
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(0..BATCH)
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.map(|_| enc.compress(divan::black_box(text)).unwrap().len())
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.sum::<usize>()
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});
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}
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}
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/// What a small text file costs between the MIME sniff and the decode:
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/// `classify` runs twice on identical bytes, and stays that way. The calls
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/// pass different `truncated` flags and disagree at a mid-sequence EOF, and
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/// the redundancy is under 1% of a cold run; re-measure here before coupling
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/// the layers to share a verdict.
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mod text_pipeline {
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use super::*;
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use std::path::Path;
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#[divan::bench]
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fn sniff_then_decode(bencher: Bencher) {
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let head = corpus::text_head();
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let path = Path::new("/tmp/bench/notes.txt");
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bencher.bench(|| {
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let looks = textenc::looks_like_text(divan::black_box(head));
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let text = textenc::decode_text(head.to_vec(), path, false).unwrap();
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(looks, text.len())
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});
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}
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#[divan::bench]
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fn sniff_only(bencher: Bencher) {
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let head = corpus::text_head();
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bencher.bench(|| textenc::looks_like_text(divan::black_box(head)));
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}
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/// Includes the `head.to_vec()` made only because `decode_text` takes
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/// ownership.
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#[divan::bench]
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fn decode_only(bencher: Bencher) {
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let head = corpus::text_head();
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let path = Path::new("/tmp/bench/notes.txt");
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bencher.bench(|| textenc::decode_text(divan::black_box(head).to_vec(), path, false));
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}
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}
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/// The MIME sniff, once per new or changed file: ~180 ns on a text head
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/// against ~2.2 µs for the `classify` next to it, so its allocations are not
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/// worth removing. This group keeps that ratio visible.
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mod mime_sniff {
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use super::*;
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use std::path::Path;
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#[divan::bench]
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fn text_head(bencher: Bencher) {
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let head = corpus::text_head();
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let path = Path::new("/tmp/bench/notes.txt");
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bencher.bench(|| mime::guess_mime_from_head(path, divan::black_box(head)));
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}
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#[divan::bench]
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fn binary_head(bencher: Bencher) {
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let head = corpus::binary_head();
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let path = Path::new("/tmp/bench/blob.bin");
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bencher.bench(|| mime::guess_mime_from_head(path, divan::black_box(head)));
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}
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/// No extension, so the sniff falls through to magic bytes and the text
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/// classifier.
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#[divan::bench]
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fn no_extension(bencher: Bencher) {
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let head = corpus::text_head();
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let path = Path::new("/tmp/bench/LICENSE");
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bencher.bench(|| mime::guess_mime_from_head(path, divan::black_box(head)));
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}
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}
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/// `repo::update_file_basic`'s state narrowing: an NA→NA update, the whole
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/// of a re-run over a text-free tree, pays one statement instead of four.
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/// `clear_always` clears unconditionally, the control that must not move
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/// between builds; `narrowed` is the shipped function. NA→NA is idempotent,
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/// so iterations are stable without re-seeding. DONE→PENDING is not benched:
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/// it clears in both shapes, so there is nothing to regress.
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mod update_narrowing {
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use super::*;
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use quicksearch_core::db::repo::{self, NewFile};
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use quicksearch_core::mime::FileType;
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use quicksearch_core::testutil::Scratch;
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use rusqlite::{params, Connection, OptionalExtension};
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const ROWS: usize = 1000;
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fn new_file(name: &str) -> NewFile<'_> {
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NewFile {
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name,
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parent: "/b/",
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size: 7,
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mtime: 7,
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mime: None,
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ftype: FileType::EMPTY,
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hash: None,
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needs_content: false,
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}
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}
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fn seeded_na(tag: &str) -> (Scratch, Connection) {
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let (dir, p) = Scratch::db(tag);
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let mut conn =
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quicksearch_core::db::open_or_recreate(p.to_str().unwrap(), &Default::default())
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.unwrap();
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let tx = conn.transaction().unwrap();
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let names: Vec<String> = (0..ROWS).map(|i| format!("f{:04}.txt", i)).collect();
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for name in &names {
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repo::insert_file(&tx, &new_file(name)).unwrap().unwrap();
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}
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tx.commit().unwrap();
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(dir, conn)
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}
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#[divan::bench]
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fn clear_always(bencher: Bencher) {
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let (_dir, mut conn) = seeded_na("bench-update-old");
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let names: Vec<String> = (0..ROWS).map(|i| format!("f{:04}.txt", i)).collect();
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bencher.bench_local(move || {
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let tx = conn.transaction().unwrap();
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for name in &names {
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let f = new_file(name);
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let id: i64 = tx
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.prepare_cached(
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"UPDATE files
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SET size = ?1, mtime = ?2, hash = ?3, mime = ?4, type = ?5,
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content_state = ?6
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WHERE parent = ?7 AND name = ?8
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RETURNING id",
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)
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.unwrap()
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.query_row(
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params![
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f.size as i64,
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f.mtime as i64,
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f.hash,
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f.mime,
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f.ftype.bits() as i64,
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repo::STATE_NA,
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f.parent,
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f.name,
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],
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|r| r.get(0),
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)
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.optional()
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.unwrap()
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.unwrap();
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repo::remove_content_for_id(&tx, id).unwrap();
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tx.prepare_cached("DELETE FROM failed_files WHERE file_id = ?1")
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.unwrap()
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.execute([id])
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.unwrap();
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}
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tx.commit().unwrap();
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});
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}
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#[divan::bench]
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fn narrowed(bencher: Bencher) {
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let (_dir, mut conn) = seeded_na("bench-update-new");
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let names: Vec<String> = (0..ROWS).map(|i| format!("f{:04}.txt", i)).collect();
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bencher.bench_local(move || {
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let tx = conn.transaction().unwrap();
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for name in &names {
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repo::update_file_basic(&tx, &new_file(name)).unwrap().unwrap();
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}
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tx.commit().unwrap();
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});
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}
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}
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/// A watcher event for a directory of indexed files, applied in one
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/// transaction as the coordinator applies a slice of its queue.
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mod directory_event {
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use super::*;
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use quicksearch_core::config::Config;
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use quicksearch_core::extract::sandbox::KillMark;
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use quicksearch_core::extract::Registry;
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use quicksearch_core::incremental::{upsert_path, Budget};
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use quicksearch_core::scope::Scope;
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use quicksearch_core::testutil::Scratch;
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use std::sync::atomic::AtomicBool;
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use std::time::{Duration, Instant};
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const FILES: usize = 500;
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/// The default config with `tree` as its only root: an event outside
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/// every root writes nothing.
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fn scoped_to(tree: &std::path::Path) -> Config {
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let mut config = Config::default();
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config.paths.indexing_paths = vec![tree.to_string_lossy().into_owned()];
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config
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}
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/// Every file unchanged: a re-sent `Create`, the live view re-checking
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/// what it shows. Nothing is written, so the cost is whatever it reads to
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/// learn that; the full walk's answer is one `stat` per file.
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#[divan::bench]
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fn unchanged(bencher: Bencher) {
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let (dir, db) = Scratch::db("bench-unchanged-event");
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let tree = db.with_file_name("tree");
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std::fs::create_dir_all(&tree).unwrap();
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for i in 0..FILES {
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std::fs::write(
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tree.join(format!("f{:04}.txt", i)),
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corpus::text(1 << 10, 4),
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)
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.unwrap();
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}
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let mut conn =
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quicksearch_core::db::open_or_recreate(db.to_str().unwrap(), &Default::default())
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.unwrap();
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let config = scoped_to(&tree);
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let scope = Scope::from_config(&config).unwrap();
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let registry = Registry::default_set();
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let cancel = AtomicBool::new(false);
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let mut apply = move || {
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let budget = Budget {
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deadline: Instant::now() + Duration::from_secs(3600),
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cancel: &cancel,
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kills: KillMark::now(),
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resumed: false,
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after: None,
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};
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// One transaction per event, as the coordinator's apply slice is.
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let tx = conn.transaction().unwrap();
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let applied =
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upsert_path(&tx, &tree, true, &config, &scope, ®istry, &budget).unwrap();
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tx.commit().unwrap();
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applied
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};
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// Indexed once; every timed run finds it unchanged.
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apply();
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bencher.bench_local(apply);
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drop(dir);
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}
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/// The same directory's own `Modify`: a `chmod`, a `touch`, an xattr, one
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/// of the directory events a `chmod -R` sends, and on Windows any change
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/// among its entries. Its files report their own changes, so it walks
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/// nothing. Measured: 1.16 ms → 1.13 µs median; before, it walked the
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/// tree as a `Create` does, at `unchanged`'s cost.
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#[divan::bench]
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fn modified(bencher: Bencher) {
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let (dir, db) = Scratch::db("bench-modified-event");
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let tree = db.with_file_name("tree");
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std::fs::create_dir_all(&tree).unwrap();
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for i in 0..FILES {
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std::fs::write(
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tree.join(format!("f{:04}.txt", i)),
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corpus::text(1 << 10, 4),
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)
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.unwrap();
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}
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let mut conn =
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quicksearch_core::db::open_or_recreate(db.to_str().unwrap(), &Default::default())
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.unwrap();
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let config = scoped_to(&tree);
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let scope = Scope::from_config(&config).unwrap();
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let registry = Registry::default_set();
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let cancel = AtomicBool::new(false);
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let mut apply = move |walk| {
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let budget = Budget {
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deadline: Instant::now() + Duration::from_secs(3600),
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cancel: &cancel,
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kills: KillMark::now(),
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resumed: false,
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after: None,
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};
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let tx = conn.transaction().unwrap();
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let applied =
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upsert_path(&tx, &tree, walk, &config, &scope, ®istry, &budget).unwrap();
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tx.commit().unwrap();
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applied
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};
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// Indexed once by its `Create`; every timed run is the `Modify`.
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apply(true);
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bencher.bench_local(move || apply(false));
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drop(dir);
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}
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/// The same directory with every file's mtime moved on before each run,
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/// so each event rewrites all of its rows and their text: a checkout or
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/// an unpack, where commit and FTS5 segment costs add up per file.
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#[divan::bench]
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fn changed(bencher: Bencher) {
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let (dir, db) = Scratch::db("bench-changed-event");
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let tree = db.with_file_name("tree");
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std::fs::create_dir_all(&tree).unwrap();
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let files: Vec<std::path::PathBuf> =
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(0..FILES).map(|i| tree.join(format!("f{:04}.txt", i))).collect();
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for file in &files {
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std::fs::write(file, corpus::text(1 << 10, 4)).unwrap();
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}
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let mut conn =
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quicksearch_core::db::open_or_recreate(db.to_str().unwrap(), &Default::default())
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.unwrap();
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let config = scoped_to(&tree);
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let scope = Scope::from_config(&config).unwrap();
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let registry = Registry::default_set();
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let cancel = AtomicBool::new(false);
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let mut apply = move || {
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let budget = Budget {
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deadline: Instant::now() + Duration::from_secs(3600),
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cancel: &cancel,
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kills: KillMark::now(),
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resumed: false,
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after: None,
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};
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// One transaction per event, as the coordinator's apply slice is.
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let tx = conn.transaction().unwrap();
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let applied =
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upsert_path(&tx, &tree, true, &config, &scope, ®istry, &budget).unwrap();
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tx.commit().unwrap();
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applied
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};
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apply();
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let mut tick = 0u64;
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bencher
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.with_inputs(|| {
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tick += 1;
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let at = std::time::UNIX_EPOCH + Duration::from_secs(1_700_000_000 + tick);
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for file in &files {
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let f = std::fs::File::options().write(true).open(file).unwrap();
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f.set_modified(at).unwrap();
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}
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})
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.bench_local_values(|()| apply());
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drop(dir);
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}
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}
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