Performance testing Load function

caddy.go

@@ -3,10 +3,16 @@ package caddy2
 import (
 	"encoding/json"
 	"fmt"
+	"log"
+	"runtime/debug"
 	"strings"
+	"sync"
 	"time"
 )
 
+var currentCfg *Config
+var currentCfgMu sync.Mutex
+
 // Start runs Caddy with the given config.
 func Start(cfg Config) error {
 	cfg.runners = make(map[string]Runner)
@@ -26,16 +32,33 @@ func Start(cfg Config) error {
 	for name, r := range cfg.runners {
 		err := r.Run()
 		if err != nil {
+			// TODO: If any one has an error, stop the others
 			return fmt.Errorf("%s module: %v", name, err)
 		}
 	}
 
+	currentCfgMu.Lock()
+	if currentCfg != nil {
+		for _, r := range cfg.runners {
+			err := r.Cancel()
+			if err != nil {
+				log.Println(err)
+			}
+		}
+	}
+	currentCfg = &cfg
+	currentCfgMu.Unlock()
+
+	// TODO: debugging memory leak...
+	debug.FreeOSMemory()
+
 	return nil
 }
 
 // Runner is a thing that Caddy runs.
 type Runner interface {
 	Run() error
+	Cancel() error
 }
 
 // Config represents a Caddy configuration.