Add latest changes from gitlab-org/gitlab@13-7-stable-eev13.7.0-rc42

1 files changed, 47 insertions, 0 deletions

diff --git a/workhorse/internal/lsif_transformer/parser/performance_test.go b/workhorse/internal/lsif_transformer/parser/performance_test.go
new file mode 100644
index 00000000000..5a12d90072f
--- /dev/null
+++ b/workhorse/internal/lsif_transformer/parser/performance_test.go
@@ -0,0 +1,47 @@
+package parser
+
+import (
+	"context"
+	"io"
+	"io/ioutil"
+	"os"
+	"runtime"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func BenchmarkGenerate(b *testing.B) {
+	filePath := "testdata/workhorse.lsif.zip"
+	tmpDir := filePath + ".tmp"
+	defer os.RemoveAll(tmpDir)
+
+	var memoryUsage float64
+	for i := 0; i < b.N; i++ {
+		memoryUsage += measureMemory(func() {
+			file, err := os.Open(filePath)
+			require.NoError(b, err)
+
+			parser, err := NewParser(context.Background(), file, Config{})
+			require.NoError(b, err)
+
+			_, err = io.Copy(ioutil.Discard, parser)
+			require.NoError(b, err)
+			require.NoError(b, parser.Close())
+		})
+	}
+
+	b.ReportMetric(memoryUsage/float64(b.N), "MiB/op")
+}
+
+func measureMemory(f func()) float64 {
+	var m, m1 runtime.MemStats
+	runtime.ReadMemStats(&m)
+
+	f()
+
+	runtime.ReadMemStats(&m1)
+	runtime.GC()
+
+	return float64(m1.Alloc-m.Alloc) / 1024 / 1024
+}