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Original file line number | Diff line number | Diff line change |
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fn main() { | ||
init_tracing(); | ||
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#[cfg(feature = "tracing")] | ||
let _span = tracing::span!(tracing::Level::DEBUG, "BENCH EXAMPLES").entered(); | ||
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// Run registered benchmarks. | ||
divan::main(); | ||
} | ||
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#[cfg(feature = "tracing")] | ||
fn init_tracing() -> impl Drop { | ||
use tracing_flame::FlameLayer; | ||
use tracing_subscriber::{fmt, prelude::*}; | ||
let filter_layer = tracing_subscriber::EnvFilter::from_default_env(); | ||
let fmt_layer = fmt::Layer::default(); | ||
let (flame_layer, _guard) = FlameLayer::with_file("./tracing.folded").unwrap(); | ||
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tracing_subscriber::registry() | ||
.with(filter_layer) | ||
.with(fmt_layer) | ||
.with(flame_layer) | ||
.init(); | ||
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_guard | ||
} | ||
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#[cfg(not(feature = "tracing"))] | ||
fn init_tracing() {} | ||
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mod examples { | ||
#[divan::bench] | ||
fn parse_postal(bencher: divan::Bencher) { | ||
bencher | ||
.with_inputs(|| { | ||
let input = | ||
std::include_str!("../tests/fixtures/postal_address.terminated.input.bnf"); | ||
input | ||
}) | ||
.bench_refs(|input| { | ||
input.parse::<bnf::Grammar>().unwrap(); | ||
}); | ||
} | ||
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#[divan::bench] | ||
fn generate_dna(bencher: divan::Bencher) { | ||
bencher | ||
.with_inputs(|| { | ||
let input = "<dna> ::= <base> | <base> <dna> | ||
<base> ::= 'A' | 'C' | 'G' | 'T'"; | ||
let grammar: bnf::Grammar = input.parse().unwrap(); | ||
grammar | ||
}) | ||
.bench_refs(|grammar| { | ||
grammar.generate().unwrap(); | ||
}); | ||
} | ||
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#[divan::bench] | ||
fn parse_polish_calculator(bencher: divan::Bencher) { | ||
let polish_calc_grammar: bnf::Grammar = "<product> ::= <number> | <op> <product> <product> | ||
<op> ::= '+' | '-' | '*' | '/' | ||
<number> ::= '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' | ||
" | ||
.parse() | ||
.unwrap(); | ||
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// use pseudo random for consistent metrics | ||
let mut rng: rand::rngs::StdRng = rand::SeedableRng::seed_from_u64(0); | ||
let random_walk_count = 100usize; | ||
let random_walks: Vec<_> = (0..random_walk_count) | ||
.map(|_| polish_calc_grammar.generate_seeded(&mut rng).unwrap()) | ||
.collect(); | ||
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bencher | ||
.with_inputs(|| { | ||
let mut rng = rng.clone(); | ||
use rand::seq::SliceRandom; | ||
random_walks.choose(&mut rng).unwrap() | ||
}) | ||
.bench_refs(|input| { | ||
let _: Vec<_> = polish_calc_grammar.parse_input(input).collect(); | ||
}); | ||
} | ||
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#[divan::bench] | ||
fn parse_infinite_nullable_grammar(bencher: divan::Bencher) { | ||
let infinite_grammar: bnf::Grammar = " | ||
<a> ::= '' | <b> | ||
<b> ::= <a>" | ||
.parse() | ||
.unwrap(); | ||
bencher | ||
.with_inputs(|| { | ||
use rand::Rng; | ||
let mut rng: rand::rngs::StdRng = rand::SeedableRng::seed_from_u64(0); | ||
let parse_count: usize = rng.gen_range(1..100); | ||
parse_count | ||
}) | ||
.input_counter(|parse_count| divan::counter::ItemsCount::new(*parse_count)) | ||
.bench_values(|parse_count| { | ||
let _: Vec<_> = infinite_grammar.parse_input("").take(parse_count).collect(); | ||
}) | ||
} | ||
} |