96711e4d8b
On advice of the department of garbage collection, forcing a garbage collection generally does not improve performance. However, this-data-is-now-unreachable is a good property to be able to test, and that requires finalizers and a forced GC. So, to save build time, this test was removed from the compiler itself, but to verify the property, it was added to the fma_test (and the end-to-end dependence on the flag was tested with an inserted failure in testing the test). TODO: also turn on the new -d=gccheck=1 debug flag on the ssacheck builder. Benchmarking reveals that it is profitable to avoid this GC, with about 1.5% reduction in both user and wall time. (48 p) https://perf.golang.org/search?q=upload:20221103.3 (12 p) https://perf.golang.org/search?q=upload:20221103.5 Change-Id: I4c4816d619735838a32388acf0cc5eb1cd5f0db5 Reviewed-on: https://go-review.googlesource.com/c/go/+/447359 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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