internal/debug: add debug_setGCPercent

internal/debug/api.go

@@ -181,6 +181,12 @@ func (*HandlerT) FreeOSMemory() {
 	debug.FreeOSMemory()
 }
 
+// SetGCPercent sets the garbage collection target percentage. It returns the previous
+// setting. A negative value disables GC.
+func (*HandlerT) SetGCPercent(v int) int {
+	return debug.SetGCPercent(v)
+}
+
 func writeProfile(name, file string) error {
 	p := pprof.Lookup(name)
 	log.Info("Writing profile records", "count", p.Count(), "type", name, "dump", file)

internal/web3ext/web3ext.go

@@ -267,6 +267,11 @@ web3._extend({
 			call: 'debug_freeOSMemory',
 			params: 0,
 		}),
+		new web3._extend.Method({
+			name: 'setGCPercent',
+			call: 'debug_setGCPercent',
+			params: 1,
+		}),
 		new web3._extend.Method({
 			name: 'memStats',
 			call: 'debug_memStats',