deno/bench_util/README.md

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# Benching utility for `deno_core` op system
Example:
```rust
use deno_bench_util::bench_js_sync;
use deno_bench_util::bench_or_profile;
use deno_bench_util::bencher::benchmark_group;
use deno_bench_util::bencher::Bencher;
use deno_core::Extension;
#[op2]
#[number]
fn op_nop() -> usize {
9
}
fn setup() -> Vec<Extension> {
vec![Extension {
name: "my_ext"
ops: std::borrow::Cow::Borrowed(&[op_nop::DECL])
}]
}
fn bench_op_nop(b: &mut Bencher) {
bench_js_sync(b, r#"Deno.core.ops.op_nop();"#, setup);
}
benchmark_group!(benches, bench_op_nop);
bench_or_profile!(benches);
```