Upgrade to rustc 1.36.0-nightly (e305df184 2019-04-24) #23263
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This includes a `size_of` regression for a few DOM types, due to rust-lang/rust#58623 which replaces the implementation of `HashMap` in the standard library to Hashbrown. Although `size_of<HashMap>` grows, it’s not obvious how total memory usage is going to be impacted: Hashbrown only has one `u8` instead of one `usize` of overhead per hash table bucket for storing (part of) a hash, and so might allocate less memory itself. Hashbrown also typically has better run time performance: https://github.com/rust-lang/hashbrown#performance Still, I’ve filed rust-lang/hashbrown#69 about potentially reducing the `size_of<HashMap>` regression.
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We could also replace this servo/components/script/dom/eventtarget.rs Line 326 in 07d1559 |
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@bors-servo r+ |
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📌 Commit 51d6b63 has been approved by |
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Upgrade to rustc 1.36.0-nightly (e305df184 2019-04-24) This includes a `size_of` regression for a few DOM types, due to rust-lang/rust#58623 which replaces the implementation of `HashMap` in the standard library to Hashbrown. Although `size_of<HashMap>` grows, it’s not obvious how total memory usage is going to be impacted: Hashbrown only has one `u8` instead of one `usize` of overhead per hash table bucket for storing (part of) a hash, and so might allocate less memory itself. Hashbrown also typically has better run time performance: https://github.com/rust-lang/hashbrown#performance Still, I’ve filed rust-lang/hashbrown#69 about potentially reducing the `size_of<HashMap>` regression. <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/23263) <!-- Reviewable:end -->
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☀️ Test successful - android-mac, arm32, arm64, linux-rel-css, linux-rel-wpt, mac-rel-css1, mac-rel-css2, mac-rel-wpt1, mac-rel-wpt2, mac-rel-wpt3, mac-rel-wpt4, magicleap, status-taskcluster |
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This includes a
size_ofregression for a few DOM types, due to rust-lang/rust#58623 which replaces the implementation ofHashMapin the standard library to Hashbrown.Although
size_of<HashMap>grows, it’s not obvious how total memory usage is going to be impacted: Hashbrown only has oneu8instead of oneusizeof overhead per hash table bucket for storing (part of) a hash, and so might allocate less memory itself.Hashbrown also typically has better run time performance: https://github.com/rust-lang/hashbrown#performance
Still, I’ve filed rust-lang/hashbrown#69 about potentially reducing the
size_of<HashMap>regression.This change is