On Fri, Dec 9, 2011 at 5:04 PM, Lin Yo-An <cornelius.h...@gmail.com> wrote:
> Hi folks,
> I am in doubt of this, I thought pure php iteration is slower than calling
> join or other extension functions.
> but the result shows:  https://gist.github.com/b2a94c94ca66a55814d4
> Using Pure PHP for iteration is faster than using join function. why ?
> because of the php runtime typecasting ?
> And json_encode is the most slowest.

There's a bug in your first test (the php iteration). You're using $i
for the inner and outer loop, meaning that the outer loop will only
run once.  Try this updated example:

On my box it gives(with microtime instead of your timer class):
php join.php
Pure PHP iteration: 0.87661409378052

String join: 0.13562703132629

json_encode: 0.081185102462769

json_encode is the fastest one here.


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