Intellij IDEA is laggy

Hi there,

Is the issue reproducible with all custom plugins disabled (File | Settings | Plugins | Installed | ⚙ | 'Disable all downloaded plugins') and IDE restarted?

Also make sure that:

• IDE config directories, installation folder and project files are excluded from the antivirus/firewall scan
• IDE is installed on a fast local drive and project files are not located on network drives

If the problem persists:

1. Capture a CPU usage snapshot. To avoid unnecessary "noise", CPU profiling should be started only when you see performance degradation, and stopped immediately after testing.
2. Take a screenshot of the Help | Diagnostic tools | Activity Monitor window while experiencing high CPU usage
3. Zip the entire log folder (Help | Collect Logs and Diagnostic Data), then send everything over for analysis. You can upload the data privately to https://uploads.jetbrains.com/ and provide the upload id here.

i have no custom plugins installed

Aryiaxd

Then please follow the rest of the instructions to collect additional information for the investigation.

Upload id: 2021_12_08_HedBVBj4nkh5CKxd (file: IC-213.5744.223_Ariya_08.12.2021_12.48.16.zip)
this is my CPU usage snapshot

this is screenshot of my activity monitor

Upload id: 2021_12_08_QBxchjV3HvRep6kK (file: idea-logs-20211208-12544810036758827878687138.zip) and this is my intellij logs

Thank you. I'll analyze the data and get back to you.

Please disable the following custom plugin:

Loaded custom plugins: Dracula Theme (1.12.2)

Then restart the IDE to see if it makes a difference.

If it doesn't help, try increasing the maximum heap size to e.g. 2000 mb in Help | Change Memory Settings.

You can also try invalidating caches: File | Invalidate Caches | Invalidate & Restart

Nothing worked 

The snapshot shows usage spikes on loading plugins, some UI element rendering (specifically in the editor), and code inspection/highlighting.

What kind of project do you have? Is the problem specific to a single project or is it reproducible in every project, even a new simple Java one?

Please attach a new CPU snapshot (1-2 min long) and batch of logs after you've set Heap Memory size to 2000m and disabled the Dracula Theme plugin.

this is my new CPU snapshot

Upload id: 2021_12_10_KYTXjmTf72Z534YG (file: IC-213.5744.223_Ariya_10.12.2021_07.40.21.zip)

and this is my log

Upload id: 2021_12_10_Uh25Fsj12JnnnwVG (file: idea-logs-20211210-0742409203805196150557005.zip)

Thank you.

I filed a new performance problem report about it to our issue tracker:

• https://youtrack.jetbrains.com/issue/IDEA-284656

Responsible developers will look into it. Feel free to follow the issue to stay updated on the progress.

Please also answer the questions from my previous message. It may help the investigation.

Does it help if you disable Grazie plug-in and increase -Xmx to 2048m in Help | Edit Custom VM Options? Make sure to restart the IDE.

i disabled Grazie and i changed heap size to 2048m

but my cpu usage is still high

my cpu usage is high in any project

What hardware do you use? What's the CPU/GPU?

my CPU is Intel(R) Core(TM)2 Duo CPU E8400 @3.00GHz

and my GPU NVIDIA GeForce GT 710

but why my CPU usage is going from 0 to 99%?

Hi, I have the same problem , today I have upgraded my PyCharm and now I cant work because the IDE UI is very laggy :((

PyCharm CPU load > 100% all time

PyCharm 2020 worked much faster, how to downgrade?

My configuration: 

Any solution?

Thanks

Alsaienko81 please report at https://youtrack.jetbrains.com/newIssue?project=IDEA with the CPU snapshot attached per https://intellij-support.jetbrains.com/hc/en-us/articles/207241235. Your issue is likely different.

Aryiaxd Please share these 2 files, for some reason -Xmx2048m setting doesn't seem to be applied to the JVM.

C:\Users\Ariya\AppData\Roaming\JetBrains\IdeaIC2021.3\idea64.exe.vmoptions
E:\Programs\JetBrains\IntelliJ IDEA Community Edition 2021.3\bin\idea64.exe.vmoptions

You can attach the files at https://youtrack.jetbrains.com/issue/IDEA-284656.

Any update on this? I am experiencing same problem, tried disabling plugins, increasing heap space with no avail.

CPU usage spontaneously spikes up to 500% when I start typing. Only solution that worked was to downgrading to a lower version.

Tsogtbileg Dash-Yondon

Your issue may be different. Please submit a report to https://youtrack.jetbrains.com/newIssue?project=IDEA with a CPU usage snapshot attached (see https://intellij-support.jetbrains.com/hc/en-us/articles/207241235). 

Thank you for your reply.

Unfortunately I have already downgraded to 2021.2.3 and am unable to report anytime soon.

Thank you Tsogtbileg Dash-Yondon.

Can't say much without the diagnostics data, so next time something like this happens, make sure to grab the logs.

Will do, thank you for your time and sorry for distracting you without having diagnostic data.

No worries at all Tsogtbileg Dash-Yondon 👍

Aryiaxd

Further analysis of the logs and thread dumps suggests that slowness may be caused by hardware rather than software configuration.

Do you have HDD or SSD (or both)? Do drives C: and E: share the same data partition? Do you have any network drives in your system?

E:\Programs\JetBrains\IntelliJ IDEA Community Edition 2021.3\bin\idea64.exe.vmoptions

is
Upload id: 2021_12_15_6AejCS5Dzc3LQSWi (file: idea64.exe.vmoptions)

and
C:\Users\Ariya\AppData\Roaming\JetBrains\IdeaIC2021.3\idea64.exe.vmoptions

is

Upload id: 2021_12_15_XkMPzRqmnBiASd8H (file: idea64.exe.vmoptions)