命令获取以毫秒为单位的时间

$ echo $(($(date +%s%N)/1000000))
1535546718115

import time
cur_time = int(time.time()*1000)

brew install coreutils

alias date='gdate'

$ date +%s%N

adjtimex | awk '/(time.tv_sec|time.tv_usec):/ { printf("%06d", $2) }'

adjtimex | awk '/(time.tv_sec|time.tv_usec):/ { printf("%06d", $2) }' && printf "\n"

ln -s /bin/busybox ./adjtimex
ln -s /bin/busybox ./awk

./adjtimex | ./awk '/(time.tv_sec|time.tv_usec):/ { printf("%06d", $2) }'

sudo apt-get install adjtimex
adjtimex -p | awk '/raw time:/ { print $6 }'

millis(){  python -c "import time; print(int(time.time()*1000))"; }

alias millis='python -c "import time; print(int(time.time()*1000))"'

$ time date +%s%N
1597103627N
date +%s%N  0.00s user 0.00s system 63% cpu 0.006 total

$ time python -c "import time; print(int(time.time()*1000))"
1597103899460
python -c "import time; print(int(time.time()*1000))"  0.03s user 0.01s system 83% cpu 0.053 total

$ time awk '@load "time"; BEGIN{print int(1000 * gettimeofday())}'
1597103729525
awk '@load "time"; BEGIN{print int(1000 * gettimeofday())}'  0.00s user 0.00s system 74% cpu 0.010 total

function timeit() {
    start=`gdate +%s%N`
    bash -c $1
    end=`gdate +%s%N`
    runtime=$(((end-start)/1000000000.0))
    echo " seconds"
}

timeit 'tsc --noEmit'

#!/bin/sh
read up rest </proc/uptime; t1="${up%.*}${up#*.}"
sleep 3    # your command
read up rest </proc/uptime; t2="${up%.*}${up#*.}"
millisec=$(( 10*(t2-t1) ))
echo $millisec

#!/usr/bin/perl -w
use strict;
use Time::HiRes qw(gettimeofday);
my ($t_sec, $usec) = gettimeofday ();
my $msec= int ($usec/1000);

命令获取以毫秒为单位的时间

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