niklak / string_contains_bench

an example of Rust benchmark

What is the purpose of this repository

• It is an example of how a benchmark can be organized.

Any explanations?

• Well, it has 3 functions in the src/lib.rs file and corresponding benchmarks in the benches/bench.rs file.
• To execute this benchmark, we need to set up a nightly Rust toolchain and then run it with cargo bench.
• Personally, I just created a file rust-toolchain in the root of this repository, which contains only the name of the toolchain -- nightly.

About this benchmark

• bench_css_class_contains_any -- wins in any case. It is much faster than others.

The worst scenario -- we didn't find any target class in the class string, but we wasted time.

test tests::bench_css_class_contains_any       ... bench:          64 ns/iter (+/- 10)
test tests::bench_css_class_contains_split     ... bench:         160 ns/iter (+/- 11)
test tests::bench_css_class_contains_substring ... bench:         131 ns/iter (+/- 3)

So the conclusion of this benchmark is that: any after a split is much effective than contains.