Andrew Berg <[email protected]> wrote:
> To add my opinion on it, I find format() much more readable and easier
> to understand (with the exception of the {} {} {} {} syntax), and would
> love to see %-style formatting phased out.
For me the %-style is much more readable. Also, it is significantly
faster:
$ ./python -m timeit -n 1000000 '"%s" % 7.928137192'
1000000 loops, best of 3: 0.0164 usec per loop
$ ./python -m timeit -n 1000000 '"{}".format(7.928137192)'
1000000 loops, best of 3: 1.01 usec per loop
In the real-world telco benchmark for _decimal, replacing the single line
outfil.write("%s\n" % t)
with
outfil.write("{}\n".format(t))
adds 23% to the runtime. I think %-style formatting should not be
deprecated at all.
Stefan Krah
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