Delays in execution outputs

[ibobak]

Type: Bug

The problem is that after certain amount of life of the notebook it stops rendering cells output immediately and there are a plenty of messages like below.

2024-06-24 09:41:43.074 [error] [9bh] potential listener LEAK detected, having 200 listeners already. MOST frequent listener (26):: Error
    at l.create (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:85:55218)
    at c.q [as onDidChange] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:87:1568)
    at Object.P [as onWillAddFirstListener] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:782:158722)
    at f.q [as onDidChange] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:87:1748)
    at W.n (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:75570)
    at W.renderElement (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:74995)
    at z.renderElement (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:612:37713)
    at ee.renderElement (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:226:2235)
    at y.Z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:183:16079)
    at y.U (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:183:12827)
    at y.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:183:11307)
    at vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:4:9068
    at Array.forEach (<anonymous>)
    at t.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:4:9055)
    at vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:226:8074
    at A.bufferEvents (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:3826)
    at Z.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:226:8050)
    at Z.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:612:64285)
    at b.t (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:179:27361)
    at b.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:179:25568)
    at D.l (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:179:34109)
    at D.setChildren (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:179:33653)
    at ie.m (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:613:5881)
    at ie.updateChildren (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:613:5535)
    at u.K [as value] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2166:40563)
    at h.y (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:659)
    at h.z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:729)
    at h.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:945)
    at u.value (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:78866)
    at h.y (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:659)
    at h.z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:729)
    at h.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:945)
    at u.value (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1695:92986)
    at T.y (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:659)
    at T.z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:729)
    at T.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:945)
    at T.resume (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:1945)
    at vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:2226
2024-06-24 09:41:46.409 [error] [9bh] potential listener LEAK detected, having 180 listeners already. MOST frequent listener (7):: Error
    at l.create (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:85:55218)
    at c.q [as onDidChange] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:87:1568)
    at Object.P [as onWillAddFirstListener] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:782:158722)
    at f.q [as onDidChange] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:87:1748)
    at T.F (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:104777)
    at T.render (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:102245)
    at P.D (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:111067)
    at P.C (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:109334)
    at u.value (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:107134)
    at h.y (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:659)
    at h.z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:729)
    at h.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:945)
    at u.value (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:123672)
    at h.y (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:659)
    at h.z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:729)
    at h.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:945)
    at $.spliceNotebookCellOutputs (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1689:1423)
    at f.jb (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1690:15680)
    at f.Q (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1690:8440)
    at f.applyEdits (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1690:7113)
    at r.t (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1688:29544)
    at r.update (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1688:28968)
    at u.$updateExecution (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1681:10285)
    at y.S (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1658:14598)
    at y.Q (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1658:14364)
    at y.M (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1658:13397)
    at y.L (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1658:12453)
    at u.value (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1658:10928)
    at h.y (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:659)
    at h.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:876)
    at r.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:615:14848)
    at U.onmessage (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1673:8154)
2024-06-24 09:41:55.420 [error] [9bh] potential listener LEAK detected, having 207 listeners already. MOST frequent listener (27):: Error
    at l.create (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:85:55218)
    at c.q [as onDidChange] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:87:1568)
    at Object.P [as onWillAddFirstListener] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:782:158722)
    at f.q [as onDidChange] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:87:1748)
    at W.n (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:75570)
    at W.renderElement (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:74995)
    at z.renderElement (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:612:37713)
    at ee.renderElement (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:226:2235)
    at y.Z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:183:16079)
    at y.U (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:183:12827)
    at y.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:183:11307)
    at vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:4:9068
    at Array.forEach (<anonymous>)
    at t.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:4:9055)
    at vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:226:8074
    at A.bufferEvents (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:3826)
    at Z.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:226:8050)
    at Z.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:612:64285)
    at b.t (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:179:27361)
    at b.splice (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:179:25568)
    at D.l (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:179:34109)
    at D.setChildren (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:179:33653)
    at ie.m (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:613:5881)
    at ie.updateChildren (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:613:5535)
    at u.K [as value] (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2166:40563)
    at h.y (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:659)
    at h.z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:729)
    at h.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:945)
    at u.value (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:2471:78866)
    at h.y (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:659)
    at h.z (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:729)
    at h.fire (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:89:945)
    at i.q (vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1695:93259)
    at vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:1695:90598
    at vscode-file://vscode-app/usr/share/code/resources/app/out/vs/workbench/workbench.desktop.main.js:138:15636

VS Code version: Code 1.90.2 (5437499feb04f7a586f677b155b039bc2b3669eb, 2024-06-18T22:33:48.698Z) OS version: Linux x64 6.4.6-060406-generic Modes:

System Info

|Item|Value| |---|---| |CPUs|Intel(R) Xeon(R) CPU E5-2696 v4 @ 2.20GHz (88 x 1197)| |GPU Status|2d_canvas: enabled
canvas_oop_rasterization: disabled_off
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
skia_graphite: disabled_off
video_decode: enabled
video_encode: disabled_software
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: disabled_off| |Load (avg)|1, 1, 1| |Memory (System)|251.76GB (106.89GB free)| |Process Argv|--crash-reporter-id 27d42247-63fb-4d9e-9cb0-87d9974843dc| |Screen Reader|no| |VM|50%| |DESKTOP_SESSION|ubuntu-xorg| |XDG_CURRENT_DESKTOP|Unity| |XDG_SESSION_DESKTOP|ubuntu-xorg| |XDG_SESSION_TYPE|x11|

Extensions (55)

Extension|Author (truncated)|Version ---|---|--- numbered-bookmarks|ale|8.4.0 project-manager|ale|12.8.0 zoomer|ant|0.3.1 vscode-django|bat|1.15.0 docs-view|bie|0.1.0 path-intellisense|chr|2.9.0 gitignore|cod|0.9.0 git-extension-pack|don|0.1.3 githistory|don|0.6.20 python-environment-manager|don|1.2.4 python-extension-pack|don|1.7.0 gitlens|eam|15.1.0 code-runner|for|0.12.2 vscode-edit-csv|jan|0.9.1 vscode-icon-theme|jtl|1.6.6 vsc-python-indent|Kev|1.18.0 vscode-checkpoints|mic|1.3.3 vscode-docker|ms-|1.29.1 csdevkit|ms-|1.7.27 csharp|ms-|2.34.12 vscode-dotnet-runtime|ms-|2.0.6 vscodeintellicode-csharp|ms-|2.1.11 black-formatter|ms-|2024.2.0 debugpy|ms-|2024.6.0 pylint|ms-|2023.10.1 python|ms-|2024.8.1 vscode-pylance|ms-|2024.6.1 datawrangler|ms-|1.2.1 jupyter|ms-|2024.5.0 jupyter-keymap|ms-|1.1.2 jupyter-renderers|ms-|1.0.18 vscode-jupyter-cell-tags|ms-|0.1.9 vscode-jupyter-powertoys|ms-|0.1.1 vscode-jupyter-slideshow|ms-|0.1.6 remote-containers|ms-|0.369.0 remote-ssh|ms-|0.112.0 remote-ssh-edit|ms-|0.86.0 remote-wsl|ms-|0.88.2 vscode-remote-extensionpack|ms-|0.25.0 remote-explorer|ms-|0.4.3 remote-server|ms-|1.5.2 vs-keybindings|ms-|0.2.1 one-dark-theme|msk|1.14.2 autodocstring|njp|0.6.1 git-file-history|pom|1.0.1 inline-sql-syntax|quf|2.16.0 gpack|Sey|2.0.0 markdown-preview-enhanced|shd|0.8.13 intellicode-api-usage-examples|Vis|0.2.8 vscodeintellicode|Vis|1.3.1 vscode-conventional-commits|viv|1.25.0 jinja|who|0.0.8 markdown-all-in-one|yzh|3.6.2 material-theme|zhu|3.17.2 vscode-open-in-github|ziy|1.3.6 (12 theme extensions excluded)

A/B Experiments

``` vsliv368:30146709 vspor879:30202332 vspor708:30202333 vspor363:30204092 vscoreces:30445986 vscod805:30301674 binariesv615:30325510 vsaa593:30376534 py29gd2263:31024239 c4g48928:30535728 azure-dev_surveyone:30548225 2i9eh265:30646982 962ge761:30959799 pythongtdpath:30769146 welcomedialog:30910333 pythonnoceb:30805159 asynctok:30898717 pythonregdiag2:30936856 pythonmypyd1:30879173 h48ei257:31000450 pythontbext0:30879054 accentitlementst:30995554 dsvsc016:30899300 dsvsc017:30899301 dsvsc018:30899302 cppperfnew:31000557 dsvsc020:30976470 pythonait:31006305 jchc7451:31067544 chatpanelt:31048053 dsvsc021:30996838 9c06g630:31013171 pythoncenvpt:31062603 a69g1124:31058053 dvdeprecation:31068756 dwnewjupyter:31046869 2f103344:31071589 legacy_priority:31077528 ```

[ibobak]

This is the continuation:

Just to clarify: I have 44 cores and 256GB RAM - more than enough, so this is definitely not the outage of resources on my PC.

[ibobak]

[DonJayamanne]

@ibobak I'm sorry I missed this issue and never got back to you. Are you still running into this same problem. By problem i mean delays in getting the output, the message potential listener leak is not likely related to this, hence lets not focus on that, instead lets try to focus on the problem you are running into and start from there.

[DonJayamanne]

Do you still run into tihs same issue when you disable ALL extensions except for

• Jupyter, Python
• & perhaps remote development extensions if you are connecting over SSH with VS Code

[vs-code-engineering[bot]]

This issue has been closed automatically because it needs more information and has not had recent activity. See also our issue reporting guidelines.

Happy Coding!

[ibobak]

@DonJayamanne don't you accept that a person who reported a bug may be in vacation, in a business trip, or just may have no time for opening issues and adding comments?

This is the easiest way to close the issue automatically for inactivity reason. But the problem is not solved yet: in the latest version it still renders slowly sometimes. This doesn't happen often, but for some reason after something happens (I don't know after what: maybe after matplotlib charts, maybe after outputting tables, maybe after outputting logs) it start behaving strange.

[DonJayamanne]

don't you accept that a person who reported a bug may be in vacation, in a business trip, or just may have no time for opening issues and

Issues get closed automatically, is not a personal decision, I can open this easily after a comment has been provided,

[DonJayamanne]

• Is it in just one notebook or all notebooks
• Are you running notebooks over ssh or similar remote connection (docker)
• Can you try disabling all extensions except for Jupyter and Python (possible some other extension is speeding down the extension host)