[xdebug-general] Re: xdebug causing PHP to run very slowly

From: Benny Butler (RPM) <benny[@]oxpublishing.com>
Date: Wed, 9 Dec 2009 14:02:09 -0600

Wow Bill, thanks for the tip on strace. Never used it before...

Hung on
connect(3, {sa_family=AF_INET, sin_port=htons(9000),
sin_addr=inet_addr("")}, 16) = 0 is MY computer, which is ALMOST ALWAYS running an IDE set
up to take data from a debugger...
But it wasn't in this case. Started up my IDE and pages flow normally.

Maybe not how yall have this set up, but I'm using a linux server for my
test machine, and programming on a windows box.

Anyway, I just turned off remote_enable and I'll use the cookie method
to turn it on as needed.


Benny Butler
General Manager
Ox Publishing

-----Original Message-----
From: Bill Moran [mailto:wmoran[@]collaborativefusion.com]
Sent: Wednesday, December 09, 2009 1:33 PM
To: Benny Butler (RPM)
Cc: xdebug-general[@]lists.xdebug.org
Subject: Re: [xdebug-general] xdebug causing PHP to run very slowly

In response to "Benny Butler (RPM)" <benny[@]oxpublishing.com>:

> Ok, I've done everything I could think of before posting to the list,
> but I'm about at the end of my rope on this one.
> I didn't want to post it on mantis, because I wasn't sure if it's a
> bug or not.
> I'm running XD 2.0.5, php 5.2.11. Running any script with xdebug
> enabled takes about 3.5 minutes. ANYTHING, like just <? break; ?>
> causes this.
> It's not a slowness problem, it seems to hang for 3.5 minutes, then it

> lets it rip...

I don't know the answer to your problem, but I'll throw out some guesses
and suggestions.

First off, I use xdebug quite a bit and have never seen this problem, so
it's not typical.

Do you possibly have xdebug configured to write data to a file that it
doesn't have write access to? That "hang" behaviour is indicative of
something in the code that's timing out (actually, sounds more like a
DNS query timeout, but I'm not sure if that can happen in xdebug. Make
sure your server has a hostname that resolves via DNS, though.)

What OS are you on? Can you run a ktrace/strace on the xdebug process
and see if there's a particular syscall that is causing the hang?


Bill Moran
Collaborative Fusion Inc.
Phone: 412-422-3463x4023
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Received on Wed Dec 09 2009 - 20:02:24 GMT

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