[LLVMdev] [lld] [patch] Mach-O Performance fix

[Jean-Daniel Dupas]

Hello,

While profiling lld, I found that lld spend more than 10% of the link time doing useless vector copy induced by used of ‘auto’ keyword.

Here is a patch to avoid that copy by explicitly requiring a reference (auto&). The culprit was ‘auto vec = pos->second’

Maybe we should review other places where auto is used to make sure that kind of issue does not occurs.


-- Jean-Daniel



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