Github Copilot slows VS Code down dramatically in several ways

Having Copilot enabled makes it difficult to run my build tasks and start debugging extensions. When I have Copilot enabled, it will sometimes take up to 20 seconds to launch a debugger session. This behavior is intermittent, sometimes it will launch immediately. When I have Copilot disabled, I do not have this issue (sample size, five weeks, with AI features enabled and disabled). When Copilot is enabled, there are many times where I try to launch a build from tasks.json and it says something to the effect of "No instance running". this does not happen every time, only occasionally. When I have Copilot disabled, this does not happen. (sample size three weeks).
When I have Copilot enabled, Ctrl+click on a variable or function is not responsive (using clangd extension). When I have Copilot dissabled, Ctrl+click on a variable or function is responsive. Also the clang formatter is extremely slow on format and save.

VS Code version: Code 1.130.0 (1b6a188127eeaf9194f945eb6eb89a657e93c54c, 2026-07-22T14:55:04Z)
OS version: Windows_NT x64 10.0.26200
Modes:

System Info

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i9-10980XE CPU @ 3.00GHz (36 x 3000)|
|GPU Status|2d_canvas: enabled
GPU0: VENDOR= 0x1002, DEVICE=0x6985 [AMD Radeon Pro WX 3100], DRIVER_VENDOR=AMD, DRIVER_VERSION=30.0.13018.2 *ACTIVE*
GPU1: VENDOR= 0x1002, DEVICE=0x6985 [AMD Radeon Pro WX 3100], DRIVER_VERSION=30.0.13018.2
GPU2: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.8875
Machine model name:
Machine model version:
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
trees_in_viz: disabled_off
video_decode: enabled
video_encode: enabled
webgl: enabled
webgpu: enabled
webnn: disabled_off|
|Load (avg)|undefined|
|Memory (System)|63.72GB (36.20GB free)|
|Process Argv|--crash-reporter-id f2339e87-35e4-43f9-a3db-44016116be60|
|Screen Reader|no|
|VM|0%|

Process Info

```

```
vsliv368:30146709
vswsl492:30256859
binariesv615:30325510
nativeloc1:31344060
dwcopilot:31170013
dwoutputs:31242946
copilot_t_ci:31333650
e5gg6876:31282496
pythonrdcb7:31342333
6518g693:31463988
aj953862:31281341
envsactivate1:31551504
478i5457:31544283
cloudbuttont:31379625
3efgi100_wstrepl:31403338
56b7f661:31457055
ddidt:31399633
ec5jj548:31422691
cp_cls_t_966_ss:31526232
4je02754:31466945
8hhj4413:31478653
cp_cls_c_1081:31454833
conptydll_true:31498968
e9c30283:31461165
test_control1:31471004
46204921:31447328
idci7584:31464702
e3e4d672:31494082
ei9d7968:31496641
nes-extended-on:31455476
chat:31457767
8hig5102:31480529
89g7j272:31518289
7e187181:31503455
i2gc6536:31499202
52612955:31516516
ghj88844:31499326
h08i8180_copy:31475368
ddid_c:31478207
hmra_i5g22:31518061
7df3h592:31512476
cp_cls_t_1082:31535311
logging_enabled_new:31498466
j0d79568:31499440
jb_cp_cls_t_632:31543129
56dj4588:31512888
32d76977:31512328
ha629193:31508444
cdk-lw-on:31524445
f9bf7985:31543584
a1ije391_t:31540920
g4a0e106:31529594
8hfba999:31537718
jbcp_cls_pctr_t:31531130
61138546:31518536
cp_intellij_t_nes:31548657
d7b18187:31526828
nes-curr-leftover-1500:31538366
ahp-both-windows:31556933
h561g132:31533256
session_8:31532895
ihg5j128:31534457
f412h606:31551416
7g2b5551:31542111
max-result-20:31551156
5fe6f778:31554331
allow-none:31555437
fd5dc207:31551400
nes-gb3-nf-5k:31554345
8hc4g144:31558143
0dg73464:31554319
d4c76da2:31557006
treatment-23-1:31555779
unuse_dynamic_mcp:31555281

```