perf: optimize slog by not calling runtime.Callers

anycable · Apr 16, 2024 · ec828d4 · ec828d4
1 parent 10fcbf5
commit ec828d4
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/cmd/anycable-go/main.go b/cmd/anycable-go/main.go
@@ -7,8 +7,17 @@ import (
 
 	"github.com/anycable/anycable-go/cli"
 	_ "github.com/anycable/anycable-go/diagnostics"
+
+	_ "unsafe"
 )
 
+// IgnorePC is responsible for adding callers pointer to log records.
+// We don't use `AddSource` in our handler, so why not dropping the `runtime.Callers` overhead?
+// See also https://github.com/rs/zerolog/issues/571#issuecomment-1697479194
+//
+//go:linkname IgnorePC log/slog/internal.IgnorePC
+var IgnorePC = true
+
 func main() {
 	c, err, ok := cli.NewConfigFromCLI(os.Args)
 	if err != nil {