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feat(bench): make benchmark inputs deterministic using fixed seed (#13586)

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Co-authored-by: Dan Cline <6798349+Rjected@users.noreply.github.com>
This commit is contained in:
Ragnar
2024-12-30 22:11:27 +01:00
committed by GitHub
parent 0b135a2670
commit 5629ba0bb1
4 changed files with 12 additions and 8 deletions
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11
testing/testing-utils/src/generators.rs
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@ -69,14 +69,19 @@ impl Default for BlockRangeParams {
/// If `SEED` is not set, a random seed is used.
pub fn rng() -> StdRng {
if let Ok(seed) = std::env::var("SEED") {
let mut hasher = DefaultHasher::new();
hasher.write(seed.as_bytes());
StdRng::seed_from_u64(hasher.finish())
rng_with_seed(seed.as_bytes())
} else {
StdRng::from_rng(thread_rng()).expect("could not build rng")
}
}
/// Returns a random number generator from a specific seed, as bytes.
pub fn rng_with_seed(seed: &[u8]) -> StdRng {
let mut hasher = DefaultHasher::new();
hasher.write(seed);
StdRng::seed_from_u64(hasher.finish())
}
/// Generates a range of random [`SealedHeader`]s.
///
/// The parent hash of the first header