On 17 Jul 2025, at 16:37, Alan Third wrote:

On Thu, Jul 17, 2025 at 03:34:51PM +0200, Przemysław Alexander Kamiński wrote:
It could be worth looking into whether we're releasing IOSurface's
correctly. I've had a look and the code looks OK to me, but I'm not an
expert on their use.

It's definitelly fine. Objects are released and are hefty but there are only few allocations.

I done the stupidest fix possible. I put 0.1 sleep in layoutSublayersOfLayer and then 0.05 sleep for windowWillResize.

Resizing is not so smooth but:

Number of allocations dropped considerably
Instance, after furious resizing, sits at 263MiB instead of 1.6GiB

I saw some allocations still going, so investigated and... tracing process.
It looks like with slowed down redrawing it can reuse object pool without expanding it and keeping overal memory low.

I ran this instance with my config and it properly shrinks memory usage while sitting at 500MiB of stable usage. On top of it - memory usage seems to get back to baseline after further resizing. I'm going to build it with all the libs/flags I use usually and run it for some time to see if there aren't any issues with it.

Best,
Przemysław Alexander Kamiński