Commits on Apr 25, 2019

1. 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.

   

   SimonSapin committed Apr 25, 2019

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