Tyriar
commented
3 years ago Can you try changing the value of terminal.integrated.gpuAcceleration to see if that helps? Also recording a performance profile would help identify where the slowness is https://github.com/Microsoft/vscode/wiki/Performance-Issues#profiling-the-renderer-process
Issue Type: Bug
In an ssh session with grep coloring enabled (specifically against a CentOS 7 target), the performance for grep . filename is far lower than grep .* filename
Both expressions will match every character, coloring every character. However, the second one will identify a single match per line, while the first one colors every single character as a separate match.
The VS Code terminal struggles in the first case, causing a timing at the remote end for an output from a small log file of 194 lines with 7986 characters to be 8 seconds. With the second version, the time usage is 0.010 seconds. Thus, the time usage with identical color transitions on the same line seems to perform far worse than what would be predicted from just the linear increase in the number of colored segments (194 segments in the first one, 7986 in the second, but time usage increasing by far more than a factor of 40).
This is using a Windows native ssh binary. Running the same binary in the plain classic Windows console, or the newer Windows Terminal, (on 22000.168) gives no noticeable difference between the two expressions (in the range of 0.010 s).
VS Code version: Code 1.59.1 (3866c3553be8b268c8a7f8c0482c0c0177aa8bfa, 2021-08-19T11:56:46.957Z) OS version: Windows_NT x64 10.0.22000 Restricted Mode: No Remote OS version: Linux x64 3.10.0-1160.36.2.el7.x86_64 Remote OS version: Linux x64 3.10.0-1160.41.1.el7.x86_64
System Info
|Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-4770S CPU @ 3.10GHz (8 x 3100)| |GPU Status|2d_canvas: enabledgpu_compositing: enabled
multiple_raster_threads: enabled_on
oop_rasterization: enabled
opengl: enabled_on
rasterization: enabled
skia_renderer: enabled_on
video_decode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled| |Load (avg)|undefined| |Memory (System)|31.94GB (8.80GB free)| |Process Argv|--crash-reporter-id 90c82e08-84ac-4efb-9a8b-686fc4a20ad1| |Screen Reader|no| |VM|0%| |Item|Value| |---|---| |Remote|SSH: alvis| |OS|Linux x64 3.10.0-1160.36.2.el7.x86_64| |CPUs|Intel(R) Xeon(R) Gold 6226R CPU @ 2.90GHz (32 x 2206)| |Memory (System)|754.39GB (674.35GB free)| |VM|0%| |Item|Value| |---|---| |Remote|SSH: rackham2.uppmax.uu.se| |OS|Linux x64 3.10.0-1160.41.1.el7.x86_64| |CPUs|Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz (40 x 2200)| |Memory (System)|251.35GB (58.15GB free)| |VM|0%|
Extensions (5)
Extension|Author (truncated)|Version ---|---|--- bracket-pair-colorizer-2|Coe|0.2.1 remote-ssh|ms-|0.65.7 remote-ssh-edit|ms-|0.65.7 remote-wsl|ms-|0.58.2 pdf|tom|1.1.0A/B Experiments
``` vsliv368cf:30146710 vsreu685:30147344 python383:30185418 pythonvspyt602:30300191 vspor879:30202332 vspor708:30202333 vspor363:30204092 pythonvspyt639:30300192 pythontb:30283811 pythonptprofiler:30281270 vshan820:30294714 vstes263:30335439 pythondataviewer:30285071 pythonvsuse255:30340121 vscod805:30301674 pythonvspyt200:30340761 vscextlangct:30333562 binariesv615:30325510 vsccppwtct:30329789 pythonvssor306:30344512 bridge0708:30335490 pygetstartedt2:30360495 bridge0723:30353136 pythonf5test824cf:30361778 vsdyn420:30356812 pythonvspyt187:30362782 pydsgsc2:30361791 vscus224cf:30358040 vssid140:30362080 ```