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idlesign/py_strformat.sh

Created December 28, 2018 06:37
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Python 3.7 string formatting variants speed measure
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py_strformat.sh
#!/bin/bash
measure () {
local RES=$(python3.7 -m timeit -n 2000000 -s 'x=256' "$1" | cut -d ":" -f 2)
echo "$1 -> $RES"
}
measure 'str(x)'
measure 'f"{x}"'
measure '"%d" % x'
measure '"{0}".format(x)'
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str(x) ->  159 nsec per loop
f"{x}" ->  58.4 nsec per loop
"%d" % x ->  122 nsec per loop
"{0}".format(x) ->  218 nsec per loop

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