Data commit

Task/Rate-counter/Go/rate-counter.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+    "fmt"
+    "math/rand"
+    "time"
+)
+
+// representation of time.Time is nanosecond, actual resolution system specific
+type rateStateS struct {
+    lastFlush time.Time
+    period    time.Duration
+    tickCount int
+}
+
+func ticRate(pRate *rateStateS) {
+    pRate.tickCount++
+    now := time.Now()
+    if now.Sub(pRate.lastFlush) >= pRate.period {
+        // TPS Report
+        tps := 0.
+        if pRate.tickCount > 0 {
+            tps = float64(pRate.tickCount) / now.Sub(pRate.lastFlush).Seconds()
+        }
+        fmt.Println(tps, "tics per second.")
+
+        // Reset
+        pRate.tickCount = 0
+        pRate.lastFlush = now
+    }
+}
+
+func somethingWeDo() {
+    time.Sleep(time.Duration(9e7 + rand.Int63n(2e7))) // sleep about .1 second.
+}
+
+func main() {
+    start := time.Now()
+
+    rateWatch := rateStateS{
+        lastFlush: start,
+        period:    5 * time.Second,
+    }
+
+    // Loop for twenty seconds
+    latest := start
+    for latest.Sub(start) < 20*time.Second {
+        somethingWeDo()
+        ticRate(&rateWatch)
+        latest = time.Now()
+    }
+}