[LLVMdev] getElapsedWallTime unnecessary heap allocation and memory leak

[Amit Rawat]

Probably because so many static allocations (in this and other small
functions) may lead to increase in the size of the executable, if there
were say even a 100 functions all having a static allocated variable,
it would need around 400 byte in the executable, a bigger object will
require even more.

That's the best explanation I can think of.

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