2013/2/13 Christian Tismer <tismer@stackless.com>
On 13.02.13 15:27, Amaury Forgeot d'Arc wrote:

2013/2/13 Lennart Regebro <regebro@gmail.com>
On Wed, Feb 13, 2013 at 1:10 PM, Serhiy Storchaka <storchaka@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