Compiler: optimize scan_specified_partitions #60852
Open
+34
−21
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Remove @isdefined checks from scan_specified_partitions by restructuring
the loop to always initialize variables on the first iteration. This
avoids the overhead of throw_undef_if_not checks in the generated code.
Co-Authored-By: Claude Opus 4.5 [email protected]
The
@isdefinedthing while cute, turns out LLVM made a mess of it and made the control flow of the function a lot more complex than it needs to be, so just manually unroll the functionSaves like 10ns per call to this (yeah the improvements are quite small)