Yuriy Novikov

add sleep to decrease cpu usage while waiting for response

1

**before:** $ `time webkit2png --xvfb 1024 1024 -g 1024 1024 --scale 200 200 --aspect-ratio=keep --timeout=30 --log='' -o /tmp/img.png http://long-site` real 0m10.553s user 0m8.383s sys 0m2.092s **after:** $ `time webkit2png --xvfb...