"Montage" page 1.37.66-217 slow loading the cameras -- scaling

[busymind]

upgraded because the swap reached 100%. never seen at 100% so I give it a try after couples of days. before upgrade the loading of montage was without any issue. Now is taking a lot of time to load, the page is unresponsive for 1 minute and plus

Screenshot_20250406_164052.png (152.05 KiB) Viewed 3277 times

after upgrade the montage is loading very slowly. Stays a lot at rescalling each camera
Take many seconds to rescale the image. The images goes black for each camera then works. Even moving the cursor the buttons over video does not appears in this stage. Two camera plugged 2K the Montage is loaded and functional after 1minute, 1 minute and half. CPU and ventilation at max speed while loading and "scaling" then works smoothly - until you refresh the page.

image below is unresponsive until scale is performed. no errors on zone minder side

Screenshot_20250406_170352.png (128.29 KiB) Viewed 3267 times

another side effect, when I go back to the Firefox Tab (changing browser tabs) starts again to be unresponsive for a while and stays at scaling stage. This behavior was not before upgrading. The single reason to initiate this upgrade was the swap reaching 100% in 3-4 days. Everything else was top notch.


Addendum -- If cameras are in night time this slowness problem- initiating the montage page - is not seen, only on day light. I think at night time the resolution of these cameras are much lower.

[IgorA100]

This is very strange.
There were no global changes on the Montage page.
I have no problems with refreshing the page. Everything works very quickly.
Show the entire console from the moment the page starts loading until the moment the delay disappears.

[busymind]

Not much to show on console. I just woke up before sun goes up and updated to latest version 217 > 237 (I dump the snapshot where all worked fine), goes quickly but now sun is up image "are better" from camera and the browser take time to load the montage page; CPU are at high speed while scaling.

When I switch (on firefox) between this page where I am writing and back to ZoneMinder Tab page, then again it's starts scaling, I have to wait 30sec-1 minute until everything goes smoothly (image and timestamps).

Now the cameras are 2K, is video pass-trough at max resolution.
At night light, work perfect and fast no issues I tested last night after upgrade. I know at night the image quality is "smoother"

Screenshot_20250409_070301.png (337.87 KiB) Viewed 2270 times

[busymind]

I had started a new instance on another browser and no issues.

Screenshot_20250409_074347.png (378.2 KiB) Viewed 2228 times

I think my actual firefox (which is running from couple of days -- if not weeks) have some issues.

[busymind]

I restarted the firefox, and still loading very slowly the montage pages.

Screenshot_20250409_075036.png (186.01 KiB) Viewed 2222 times

[busymind]

I updated, restarted, the system, flushed the caches; only on firefox esr this slowness is found accessing the montage page. I have to wait 30sec - 1 minute to load the image and becoming fluent.

between each re-scalling (in console) the image are disappearing and re-appearing, browser page "freeze".

[IgorA100]

Indeed, there is a problem only with Firefox
I will fix it soon.

[IgorA100]

Try applying this PR https://github.com/ZoneMinder/zoneminder/pull/4301
Everything should work fast as before.

[busymind]

Thank you guys. Replaced the code I will check tomorrow morning, at this hour sun is down, works no issues.