debugui: replace runtime.Caller with Callers for performance

hajimehoshi · hajimehoshi · commit 80a511feb870 · 2025-07-12T02:35:33.000+09:00
diff --git a/id.go b/id.go
@@ -10,11 +10,12 @@ import (
 
 // caller returns a program counter of the caller.
 func caller() uintptr {
-	pc, _, _, ok := runtime.Caller(2)
-	if !ok {
+	var pcs [1]uintptr
+	n := runtime.Callers(3, pcs[:])
+	if n == 0 {
 		return 0
 	}
-	return pc
+	return pcs[0]
 }
 
 // Loop creates a loop to iterate by the given count.

Original file line number	Diff line number	Diff line change
`@@ -10,11 +10,12 @@ import (`
`10`	`10`
`11`	`11`	`// caller returns a program counter of the caller.`
`12`	`12`	`func caller() uintptr {`
`13`		`- pc, _, _, ok := runtime.Caller(2)`
`14`		`- if !ok {`
	`13`	`+ var pcs [1]uintptr`
	`14`	`+ n := runtime.Callers(3, pcs[:])`
	`15`	`+ if n == 0 {`
`15`	`16`	`return 0`
`16`	`17`	`}`
`17`		`- return pc`
	`18`	`+ return pcs[0]`
`18`	`19`	`}`
`19`	`20`
`20`	`21`	`// Loop creates a loop to iterate by the given count.`