log-relativizer

可以将文件中的ISO8601时间戳转换为相对于第一个时间戳的持续时间。这比解释更容易演示，所以

$ cat examples/test.log | log-relativizer
[0s] starting the tests
[1s928ms] test 1
[2s196ms] some logs and crap
[2s461ms] test 2
[3s53ms] whoa so many logs
[3s458ms] tests complete!