2013/2/13 Christian Tismer <tis...@stackless.com> > On 13.02.13 15:27, Amaury Forgeot d'Arc wrote: > > > 2013/2/13 Lennart Regebro <rege...@gmail.com> > >> On Wed, Feb 13, 2013 at 1:10 PM, Serhiy Storchaka <storch...@gmail.com> >> wrote: >> > I prefer "x = '%s%s%s%s' % (a, b, c, d)" when string's number is more >> than 3 >> > and some of them are literal strings. >> >> This has the benefit of being slow both on CPython and PyPy. Although >> using .format() is even slower. :-) > > > Did you really try it? > PyPy is really fast with str.__mod__, when the format string is a constant. > Yes, it's jitted. > > > How about the .format() style: Is that jitted as well? > In order to get people to prefer .format over __mod__, > it would be nice if PyPy made this actually _faster_ :-)
.format() is jitted as well. But it's still slower than str.__mod__ (about 25%) I suppose it can be further optimized. -- Amaury Forgeot d'Arc
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