Egon Elbre e85ffec784 cmd/cgo: optimize cgoCheckPointer call ... Currently cgoCheckPointer is only used with one optional argument. Using a slice for the optional arguments is quite expensive, hence replace it with a single interface{}. This results in ~30% improvement. When checking struct fields, they quite often end up being without pointers. Check this before calling cgoCheckPointer, which results in additional ~20% improvement. Inline some p == nil checks from cgoIsGoPointer which gives additional ~15% improvement. All of this translates to: name old time/op new time/op delta CgoCall/add-int-32 46.9ns ± 1% 46.6ns ± 1% -0.75% (p=0.000 n=18+20) CgoCall/one-pointer-32 143ns ± 1% 87ns ± 1% -38.96% (p=0.000 n=20+20) CgoCall/eight-pointers-32 767ns ± 0% 327ns ± 1% -57.30% (p=0.000 n=18+16) CgoCall/eight-pointers-nil-32 110ns ± 1% 89ns ± 2% -19.10% (p=0.000 n=19+19) CgoCall/eight-pointers-array-32 5.09µs ± 1% 3.56µs ± 2% -30.09% (p=0.000 n=19+19) CgoCall/eight-pointers-slice-32 3.92µs ± 0% 2.57µs ± 2% -34.48% (p=0.000 n=20+20) Change-Id: I2aa9f5ae8962a9a41a7fb1db0c300893109d0d75 Reviewed-on: https://go-review.googlesource.com/c/go/+/198081 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>		2019-10-02 20:51:29 +00:00
..
testdata	cmd/link: permit duplicate weak symbols	2019-03-29 17:46:01 +00:00
backdoor.go
buildid_linux.go	misc/cgo/test: avoid endless loop when we can't parse notes	2018-01-11 19:55:49 +00:00
callback_c_gc.c
callback_c_gccgo.c
callback_c.c
callback.go	cmd/compile: use existing instructions instead of nops for inline marks	2019-03-25 16:49:29 +00:00
cgo_linux_test.go	misc/cgo/test: skip Setgid test on Android	2019-04-08 05:56:14 +00:00
cgo_stubs_android_test.go	misc/cgo/test: consolidate tests into fewer cgo source files	2019-05-22 12:52:33 +00:00
cgo_test.go	misc, runtime, test: extra tests and benchmarks for defer	2019-09-25 23:27:16 +00:00
cgo_thread_lock.go
cgo_unix_test.go
cthread_unix.c	cmd/dist, misc/cgo: enable tests for aix/ppc64	2019-03-20 14:38:44 +00:00
cthread_windows.c
issue4029.c	cmd/cgo: permit missing dynamic symbol section	2018-07-02 17:50:00 +00:00
issue4029.go	cmd/cgo: permit missing dynamic symbol section	2018-07-02 17:50:00 +00:00
issue4029w.go	cmd/cgo: permit missing dynamic symbol section	2018-07-02 17:50:00 +00:00
issue4273.c
issue4273b.c
issue4339.c
issue4339.h
issue5548_c.c
issue5740a.c
issue5740b.c
issue6833_c.c
issue6907export_c.c	cmd/cgo: permit passing string values directly between Go and C	2017-11-15 03:36:54 +00:00
issue6997_linux.c
issue6997_linux.go
issue7234_test.go
issue8148.go
issue8331.h
issue8517_windows.c
issue8517_windows.go
issue8517.go
issue8694.go
issue8811.c
issue8945.go
issue18146.go	misc/cgo/test: consolidate tests into fewer cgo source files	2019-05-22 12:52:33 +00:00
issue20910.c	cmd/cgo: unify cgo output for gc and gccgo	2017-08-16 21:57:56 +00:00
issue21897.go	misc/cgo/test: disable some Darwin tests in cgo mode	2018-07-23 15:16:01 +00:00
issue21897b.go	misc/cgo/test: disable some Darwin tests in cgo mode	2018-07-23 15:16:01 +00:00
overlaydir_test.go	misc/cgo/test: fix tests in module mode	2019-02-24 00:35:18 +00:00
pkg_test.go	misc/cgo/test: set PWD when executing 'go test' in an alternate GOPATH	2019-03-01 18:35:31 +00:00
setgid_linux.go
sigaltstack.go	all: add new GOOS=illumos, split out of GOOS=solaris	2019-04-30 16:59:13 +00:00
sigprocmask.c	misc/cgo/test: add retry loop around pthread_create in TestSigprocmask	2018-06-27 04:33:10 +00:00
sigprocmask.go	misc/cgo/test: log error value in testSigprocmask	2018-04-25 20:26:39 +00:00
test_unix.go	misc/cgo/test: consolidate tests into fewer cgo source files	2019-05-22 12:52:33 +00:00
test_windows.go	misc/cgo/test: consolidate tests into fewer cgo source files	2019-05-22 12:52:33 +00:00
test.go	cmd/cgo: optimize cgoCheckPointer call	2019-10-02 20:51:29 +00:00
testx.go	misc/cgo/test: use __atomic intrinsics instead of __sync	2019-09-06 17:38:58 +00:00