[iterm2-discuss] Missing option to disable GPU rendering in 3.2.0?

[r***@meshdharan.com]

I'm running iTerm2 build 3.2.0 downloaded
from https://iterm2.com/downloads/stable/iTerm2-3_2_0.zip.

I'm having some performance problems (severe lag, frame rates < 10 fps and
sluggish response) along with high CPU usage and I'd like to see if
disabling the Metal renderer could help.

Unfortunately I can't find the documented preference setting. According
to https://gitlab.com/gnachman/iterm2/wikis/Metal-Renderer, it should be in
Prefs > General > GPU Rendering, but I don't have anything GPU related
there, and searching doesn't reveal any preferences with 'GPU' in the name
or description:




[image: Screen Shot 2018-08-10 at 4.21.55 PM.png] <about:invalid#zClosurez>

I do have a few Metal-related settings though, and I can confirm that the
Metal renderer is being used if I enable the framerate setting since I see
the framerate (and it's terrible).

[image: Screen Shot 2018-08-10 at 4.22.18 PM.png] <about:invalid#zClosurez>
Any thoughts or suggestions?

Thanks in advance,

--Ramesh

[George Nachman]

It's no longer in advanced prefs, but in Prefs>General.

I'm running iTerm2 build 3.2.0 downloaded from
https://iterm2.com/downloads/stable/iTerm2-3_2_0.zip.
I'm having some performance problems (severe lag, frame rates < 10 fps and
sluggish response) along with high CPU usage and I'd like to see if
disabling the Metal renderer could help.
Unfortunately I can't find the documented preference setting. According to
https://gitlab.com/gnachman/iterm2/wikis/Metal-Renderer, it should be in
Prefs > General > GPU Rendering, but I don't have anything GPU related
there, and searching doesn't reveal any preferences with 'GPU' in the name
[image: Screen Shot 2018-08-10 at 4.21.55 PM.png]
I do have a few Metal-related settings though, and I can confirm that the
Metal renderer is being used if I enable the framerate setting since I see
the framerate (and it's terrible).
[image: Screen Shot 2018-08-10 at 4.22.18 PM.png]
Any thoughts or suggestions?
Thanks in advance,
--Ramesh
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[Ramesh Dharan]

Thanks!

And FWIW some further experimentation suggests that the real issue is my
resolution, either the sheer number of pixels or the fact that it’s
non-standard (I recently switched to a 32” external display that I set to
3200x1800 using QuickRes - http://www.quickresapp.com). I’m using an older
15” MBP with only integrated graphics and seems like it just can’t keep up.
Metal/GPU vs. CPU rendering doesn’t make much of a difference, and
Terminal.app struggles too.

Post by George Nachman
It's no longer in advanced prefs, but in Prefs>General.

I'm running iTerm2 build 3.2.0 downloaded from
https://iterm2.com/downloads/stable/iTerm2-3_2_0.zip.
I'm having some performance problems (severe lag, frame rates < 10 fps
and sluggish response) along with high CPU usage and I'd like to see if
disabling the Metal renderer could help.
Unfortunately I can't find the documented preference setting. According
to https://gitlab.com/gnachman/iterm2/wikis/Metal-Renderer, it should be
in Prefs > General > GPU Rendering, but I don't have anything GPU related
there, and searching doesn't reveal any preferences with 'GPU' in the name
[image: Screen Shot 2018-08-10 at 4.21.55 PM.png]
I do have a few Metal-related settings though, and I can confirm that the
Metal renderer is being used if I enable the framerate setting since I see
the framerate (and it's terrible).
[image: Screen Shot 2018-08-10 at 4.22.18 PM.png]
Any thoughts or suggestions?
Thanks in advance,
--Ramesh
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[George Nachman]

I had the same setup at work. The gpu doesn’t have enough memory is my
theory. You should try the next 3.2 beta when it comes out. There’s a new
feature to detect this situation and render fewer frames concurrently,
which ought to help.

Post by Ramesh Dharan
Thanks!
And FWIW some further experimentation suggests that the real issue is my
resolution, either the sheer number of pixels or the fact that it’s
non-standard (I recently switched to a 32” external display that I set to
3200x1800 using QuickRes - http://www.quickresapp.com). I’m using an
older 15” MBP with only integrated graphics and seems like it just can’t
keep up. Metal/GPU vs. CPU rendering doesn’t make much of a difference, and
Terminal.app struggles too.

Post by George Nachman
It's no longer in advanced prefs, but in Prefs>General.

I'm running iTerm2 build 3.2.0 downloaded from
https://iterm2.com/downloads/stable/iTerm2-3_2_0.zip.
I'm having some performance problems (severe lag, frame rates < 10 fps
and sluggish response) along with high CPU usage and I'd like to see if
disabling the Metal renderer could help.
Unfortunately I can't find the documented preference setting. According
to https://gitlab.com/gnachman/iterm2/wikis/Metal-Renderer, it should
be in Prefs > General > GPU Rendering, but I don't have anything GPU
related there, and searching doesn't reveal any preferences with 'GPU' in
[image: Screen Shot 2018-08-10 at 4.21.55 PM.png]
I do have a few Metal-related settings though, and I can confirm that
the Metal renderer is being used if I enable the framerate setting since I
see the framerate (and it's terrible).
[image: Screen Shot 2018-08-10 at 4.22.18 PM.png]
Any thoughts or suggestions?
Thanks in advance,
--Ramesh
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Groups "iterm2-discuss" group.
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