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printer: rejigger how we use serde_derive

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The idea is that by bringing derives in via serde's optional feature, it
was inhibiting compilation speed[1]. We try to fix that by depending on
`serde_derive` as a distinct dependency.

It does seem to improve overall compilation time, but only by about 0.5
seconds. With that said, my machine has a lot of cores, so it's possible
this will help more on less powerful CPUs.

[1]: https://old.reddit.com/r/rust/comments/17rd8ww/faster_compilation_with_the_parallel_frontend_in/k8igjlg/
This commit is contained in:
Andrew Gallant
2023-11-21 08:10:04 -05:00
parent 5dc424d302
commit cddb5f57f8
4 changed files with 12 additions and 11 deletions
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2
crates/printer/src/stats.rs
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@ -10,7 +10,7 @@ use crate::util::NiceDuration;
/// When statistics are reported by a printer, they correspond to all searches
/// executed with that printer.
#[derive(Clone, Debug, Default, PartialEq, Eq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize))]
#[cfg_attr(feature = "serde", derive(serde_derive::Serialize))]
pub struct Stats {
elapsed: NiceDuration,
searches: u64,