register_shutdown_function causing script to run very slowly

[Joshua Beall]

Hi All,

I use register_shutdown_function to register a function that then gets run
when the script finishes executing. It worked great before, but sometime
last week on my development server all my sites started going very slowly.
It is still running fine on the production server (thankfully).

Nothing was changed. In fact, I was out of town that week, and the dev
server was powered off.

I did a little investigation, trying to locate the source of the slowdown,
and eventually I narrowed it down to the line:

register_shutdown_function('siteShutdown');

Commenting out that line made things run perfectly again (generates within
20-80 ms, depending on the page size). Uncomment it, and the page takes 3-4
seconds to generate. It does not generate piecemeal, either; it is blank
for several seconds, then in blink, the entire page arrives.

Has anyone got any ideas? What could cause this, and how could it suddenly
start happening, without me making any changes?

Sincerely,
-Josh

[yawnmoth]

On Wed, 02 Jun 2004 12:22:06 GMT, "Joshua Beall"
<jb****@donotspam.remove.me.heraldic.us> wrote:

Hi All,

I use register_shutdown_function to register a function that then gets run
when the script finishes executing. It worked great before, but sometime
last week on my development server all my sites started going very slowly.
It is still running fine on the production server (thankfully).

Nothing was changed. In fact, I was out of town that week, and the dev
server was powered off.

I did a little investigation, trying to locate the source of the slowdown,
and eventually I narrowed it down to the line:

register_shutdown_function('siteShutdown');

Commenting out that line made things run perfectly again (generates within
20-80 ms, depending on the page size). Uncomment it, and the page takes 3-4
seconds to generate. It does not generate piecemeal, either; it is blank
for several seconds, then in blink, the entire page arrives.

Has anyone got any ideas? What could cause this, and how could it suddenly
start happening, without me making any changes?

Sincerely,
-Josh

based on the experiences i've had with register_shutdown_function, it
seems that, while it makes the function you specify the last function
executed, it doesn't make it execute after the connection has been
closed. the work around to this that i used involved sending a whole
new http request, with fsocketopen and fputs, but never reading the
data. the script i would send the request to would check to see if
the originating ip address of the request was the same as the server's
ip address, among other things. not a particurarly pretty solution,
but whatever, heh.

[Colin McKinnon]

Joshua Beall wrote:

register_shutdown_function('siteShutdown');

Commenting out that line made things run perfectly again (generates within
20-80 ms, depending on the page size). Uncomment it, and the page takes
3-4
seconds to generate. It does not generate piecemeal, either; it is blank
for several seconds, then in blink, the entire page arrives.

I use this function regularly without any problems - suggest U look at what
you are doing within function siteShutdown()

C.