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client: get rid of slow math/rand for sleep jitter generation

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This commit is contained in:
Aliaksandr Valialkin
2016-04-04 15:02:33 +03:00
parent adac101acf
commit e9544cbb6f
1 changed files with 4 additions and 2 deletions
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client.go
+4 -2
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@@ -7,7 +7,6 @@ import (
"errors"
"fmt"
"io"
"math/rand"
"net"
"strings"
"sync"
@@ -860,10 +859,13 @@ func clientDoDeadline(req *Request, resp *Response, deadline time.Time, c client
}
}
var sleepJitter uint64
func updateSleepTime(prevTime time.Duration, deadline time.Time) time.Duration {
sleepTime := prevTime * 2
if sleepTime == 0 {
sleepTime = (10 + time.Duration(rand.Intn(40))) * time.Millisecond
jitter := atomic.AddUint64(&sleepJitter, 1) % 40
sleepTime = (10 + time.Duration(jitter)) * time.Millisecond
}
remainingTime := deadline.Sub(time.Now())