mirror of https://github.com/denoland/deno.git
123 lines
3.0 KiB
Rust
123 lines
3.0 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use bencher::Bencher;
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use deno_core::v8;
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use deno_core::Extension;
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use deno_core::JsRuntime;
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use deno_core::RuntimeOptions;
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use crate::profiling::is_profiling;
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pub fn create_js_runtime(setup: impl FnOnce() -> Vec<Extension>) -> JsRuntime {
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JsRuntime::new(RuntimeOptions {
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extensions: setup(),
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module_loader: Some(
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std::rc::Rc::new(deno_core::ExtModuleLoader::default()),
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),
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..Default::default()
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})
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}
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fn loop_code(iters: u64, src: &str) -> String {
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format!(r#"for(let i=0; i < {iters}; i++) {{ {src} }}"#,)
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}
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#[derive(Copy, Clone)]
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pub struct BenchOptions {
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pub benching_inner: u64,
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pub profiling_inner: u64,
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pub profiling_outer: u64,
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}
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impl Default for BenchOptions {
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fn default() -> Self {
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Self {
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benching_inner: 1_000,
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profiling_inner: 1_000,
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profiling_outer: 10_000,
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}
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}
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}
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pub fn bench_js_sync(
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b: &mut Bencher,
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src: &str,
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setup: impl FnOnce() -> Vec<Extension>,
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) {
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bench_js_sync_with(b, src, setup, Default::default())
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}
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pub fn bench_js_sync_with(
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b: &mut Bencher,
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src: &str,
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setup: impl FnOnce() -> Vec<Extension>,
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opts: BenchOptions,
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) {
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let mut runtime = create_js_runtime(setup);
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let scope = &mut runtime.handle_scope();
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// Increase JS iterations if profiling for nicer flamegraphs
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let inner_iters = if is_profiling() {
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opts.profiling_inner * opts.profiling_outer
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} else {
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opts.benching_inner
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};
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// Looped code
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let looped_src = loop_code(inner_iters, src);
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let code = v8::String::new(scope, looped_src.as_ref()).unwrap();
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let script = v8::Script::compile(scope, code, None).unwrap();
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// Run once if profiling, otherwise regular bench loop
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if is_profiling() {
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script.run(scope).unwrap();
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} else {
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b.iter(|| {
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script.run(scope).unwrap();
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});
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}
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}
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pub fn bench_js_async(
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b: &mut Bencher,
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src: &str,
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setup: impl FnOnce() -> Vec<Extension>,
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) {
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bench_js_async_with(b, src, setup, Default::default())
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}
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pub fn bench_js_async_with(
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b: &mut Bencher,
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src: &str,
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setup: impl FnOnce() -> Vec<Extension>,
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opts: BenchOptions,
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) {
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let mut runtime = create_js_runtime(setup);
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let tokio_runtime = tokio::runtime::Builder::new_current_thread()
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.enable_all()
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.build()
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.unwrap();
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// Looped code
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let inner_iters = if is_profiling() {
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opts.profiling_inner
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} else {
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opts.benching_inner
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};
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let looped = loop_code(inner_iters, src);
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// Get a &'static str by leaking -- this is fine because it's benchmarking code
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let src = Box::leak(looped.into_boxed_str());
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if is_profiling() {
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for _ in 0..opts.profiling_outer {
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tokio_runtime.block_on(inner_async(src, &mut runtime));
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}
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} else {
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b.iter(|| {
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tokio_runtime.block_on(inner_async(src, &mut runtime));
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});
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}
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}
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async fn inner_async(src: &'static str, runtime: &mut JsRuntime) {
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runtime.execute_script("inner_loop", src).unwrap();
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runtime.run_event_loop(false).await.unwrap();
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}
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