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| From: | Paolo Bonzini |
| Subject: | Re: [PATCH] maint.mk: print the elapsed time for each syntax-check rule |
| Date: | Wed, 14 Apr 2010 07:52:07 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100301 Fedora/3.0.3-1.fc12 Lightning/1.0b2pre Thunderbird/3.0.3 |
On 04/13/2010 10:41 AM, Pádraig Brady wrote:
> ts1=$(printf "%.2f\n" $(date +%s.%N) | tr -d .) sleep 1.5 ts2=$(printf "%.2f\n" $(date +%s.%N) | tr -d .) echo $(($ts2 - $ts1)) | sed 's/\(..\)$/.\1/'
Or somewhat creatively:
ts1=$(date +%s%N); ts1=${ts1%???????}
sleep 0.5
ts2=$(date +%s%N); ts2=${ts2%???????}
ts=$(($ts2 - $ts1 + 100))
echo $((${ts%??} - 1)).${ts:$((${#ts}-2))}
The last line is only half serious, but the first one is actually
practical to use.
Paolo
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