I just upgraded PHP from 7.4 to 8.3 and applications are running so much slower. My problem seems nearly identical to the previous defect https://bugs.xdebug.org/view.php?id=2076.

I also get many (>20) repeated messages in the xdebug log of the form:
[15600] [Step Debug] ERR: Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port).
[15600] [Step Debug] INFO: Connecting to configured address/port: localhost:9003.

In my case, I'm making the request to PHP from my regression tests. I know each of the requests made to PHP, there are only two:

[17/May/2024:17:50:27 +0000] 10.0.3.186 - "POST /api/authenticatev3 HTTP/1.1" 200 123 "-"
[17/May/2024:17:50:41 +0000] 10.0.3.186 - "DELETE /api/user/users?username=doesnotmatter%40bugsplat.com HTTP/1.1" 403 58 "-"

Any advice would be appreciated!

php.ini:

zend_extension = "C:\www\php8\ext\php_xdebug-3.3.2-8.3-vs16-x86_64.dll"
xdebug.mode=debug
xdebug.start_with_request=yes

xdebug.remote_handler=dbgp
xdebug.client_host=localhost
xdebug.client_port = 9003
xdebug.max_nesting_level=1024
xdebug.client_port=9003

xdebug.output_dir="c:\www\webroot\tmp"
xdebug.log_level=7
xdebug.log = "c:\www\Apache2.4\logs\xdebug.log"