Speed up crossgen2 by a couple percent #63234
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I ran crossgen2 compiling a Release CoreLib under a profiler and this stood out quite a bit. The JIT-based CoreLib doesn't have the `Array<T>` type so `GetType` was walking all types in CoreLib. I split this logic out to an ILC-specific file. I don't remember this showing up in the profiles for ILC, but I added a cache nevertheless.
ghost
added
the
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@dotnet/crossgen-contrib could someone have a look please? |
jkotas
approved these changes
Dec 31, 2021
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@MichalStrehovsky btw, more like by 40% 😄 |
Nice! I didn't bother to measure. I was guessing 10% based on the profile. |
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I ran crossgen2 compiling a Release CoreLib under a profiler and this stood out quite a bit. The JIT-based CoreLib doesn't have the
Array<T>type soGetTypewas walking all types in CoreLib.I split this logic out to an ILC-specific file. I don't remember this showing up in the profiles for ILC, but I added a cache nevertheless.