Add printing of number of goroutines to assist with performance improvements

background/ticker.go

@@ -1,6 +1,8 @@
 package background
 
 import (
+	"fmt"
+	"runtime"
 	"time"
 
 	"git.fjla.uk/owlboard/timetable-mgr/cif"
@@ -9,11 +11,16 @@ import (
 	"git.fjla.uk/owlboard/timetable-mgr/log"
 )
 
-const frequency = 600 * time.Hour // Figure out a sensible frequency!
+const frequency = 2 * time.Hour // Figure out a sensible frequency!
 
 // Starts a background ticker to run background tasks.  Uses the frequency configured in the background/ticker.go file
 func InitTicker(cfg *helpers.Configuration, stop <-chan struct{}) {
 	go runTicker(cfg, stop)
+
+	// Run goroutine logging ticker if runtime set to debug
+	if helpers.Runtime == "debug" {
+		go goroutineTicker(stop)
+	}
 }
 
 // Runs the ticker and handles tick events
@@ -32,3 +39,18 @@ func runTicker(cfg *helpers.Configuration, stop <-chan struct{}) {
 		}
 	}
 }
+
+// Starts a ticker that logs how many goroutines are running every two seconds
+func goroutineTicker(stop <-chan struct{}) {
+	log.Msg.Warn("Starting goroutine Tracker ticker - DEBUG USE ONLY")
+	ticker := time.NewTicker(1000 * time.Millisecond)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-stop:
+			return
+		case <-ticker.C:
+			fmt.Printf("Number of goroutines running: %d\n", runtime.NumGoroutine())
+		}
+	}
+}