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Armin Rigo said...

@PeteVine: to clarify, PyPy has no JIT backend emitting the old-style x87 fpu instructions. What you are posting is very likely a PyPy whose JIT doesn't support floats at all. It emits calls to already-compiled functions, like the one doing addition of float objects, instead of writing a SSE2 float addition on unboxed objects.

Instead, use the official PyPy and run it with vectorization turned on and off (as documented) on the same modern machine. This allows an apple-to-apple comparison.

Oct 31, 2015, 4:54:19 PM

Posted to PyPy 4.0.0 Released - A Jit with SIMD Vectorization and More