Some data structures had to be turned into Sync to make the rewriter Send (if the handlers are Send). This has a performance penalty even when using a non-Send rewriter.
The benchmarks have a median slowdown of -0.8%. You read that right: a negative slowdown, which is a speedup. This can only be explained by noise while running the benchmarks, as they can only get slightly slower, not faster. However, it shows that the performance change is negligible (in my x86 machine, at least).
Some data structures had to be turned into
Syncto make the rewriterSend(if the handlers areSend). This has a performance penalty even when using a non-Sendrewriter.The benchmarks have a median slowdown of -0.8%. You read that right: a negative slowdown, which is a speedup. This can only be explained by noise while running the benchmarks, as they can only get slightly slower, not faster. However, it shows that the performance change is negligible (in my x86 machine, at least).