diff options
Diffstat (limited to 'src/runtime/slice_test.go')
| -rw-r--r-- | src/runtime/slice_test.go | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/runtime/slice_test.go b/src/runtime/slice_test.go index 376b4a58f2..4779459c48 100644 --- a/src/runtime/slice_test.go +++ b/src/runtime/slice_test.go @@ -7,6 +7,7 @@ package runtime_test import ( "fmt" "internal/asan" + "internal/goexperiment" "internal/msan" "internal/race" "internal/testenv" @@ -541,6 +542,18 @@ func TestAppendByteInLoop(t *testing.T) { n := test[0] want := test[1] wantCap := test[2] + + if goexperiment.RuntimeFreegc && n > 64 { + // Only 1 allocation is expected to be reported. + // + // TODO(thepudds): consider a test export or similar that lets us more directly see + // the count of freed objects, reused objects, and allocated objects. This could + // be in advance of any future runtime/metrics or user-visible API, or perhaps + // we could introduce the concept of build tag or debug flag controlled runtime/metrics + // targeting people working on the runtime and compiler (but not formally supported). + want = 1 + } + var r []byte got := testing.AllocsPerRun(10, func() { r = byteSlice(n) @@ -659,6 +672,12 @@ func TestAppendByteCapInLoop(t *testing.T) { n := test[0] want := test[1] wantCap := test[2] + + if goexperiment.RuntimeFreegc && n > 64 { + // Only 1 allocation is expected to be reported. + want = 1 + } + var r []byte got := testing.AllocsPerRun(10, func() { r, _ = byteCapSlice(n) |