CI: Enable compiler cache for Windows

[ayeteadoe]

Addresses this message in ui-windows

NOTE: I will be adding a test/throwaway commit to confirm if Windows CI uses the cache. Once that is confirmed I will rebase without that commit. Update: The test worked, see result below, second commit has been re-based away.

Results

Initial run

Overall build time: 1h 21m 48s

https://github.com/LadybirdBrowser/ladybird/actions/runs/16713437851/job/47302228759?pr=5696

Cache Restore

Prepare all required actions
Getting action download info
Download immutable action package 'actions/cache@v4'
Run ./.github/actions/cache-restore
Run echo "timestamp=$(date -u "+%Y%m%d%H%M_%S")" >> "$GITHUB_OUTPUT"
Run actions/cache/restore@v4
Cache not found for input keys: "ccache" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040344_26, "ccache" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0"
Run $env:CCACHE_DIR = "C:\a\ladybird\ladybird/.ccache"
Unset cache size limit
Local storage:
  Cache size (GiB): 0.0
Statistics zeroed
Run actions/cache/restore@v4
Cache hit for: "vcpkg" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040344_26
Received 8388608 of 850387973 (1.0%), 8.0 MBs/sec
Received 130023424 of 850387973 (15.3%), 61.9 MBs/sec
Received 209715200 of 850387973 (24.7%), 66.4 MBs/sec
Received 268435456 of 850387973 (31.6%), 63.7 MBs/sec
Received 402653184 of 850387973 (47.3%), 76.0 MBs/sec
Received 524288000 of 850387973 (61.7%), 82.6 MBs/sec
Received 620756992 of 850387973 (73.0%), 83.8 MBs/sec
Received 671088640 of 850387973 (78.9%), 79.3 MBs/sec
Received 801112064 of 850387973 (94.2%), 84.2 MBs/sec
Received 850387973 of 850387973 (100.0%), 81.9 MBs/sec
Cache Size: ~811 MB (850387973 B)
"C:\Program Files\Git\usr\bin\tar.exe" -xf C:/a/_temp/83e99f17-e831-4fc0-bf31-6e8bcd801d4b/cache.tzst -P -C C:/a/ladybird/ladybird --force-local --use-compress-program "zstd -d"
Cache restored successfully
Cache restored from key: "vcpkg" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040029_08

Cache Save

Prepare all required actions
Getting action download info
Run ./.github/actions/cache-save
Run $env:CCACHE_DIR = "C:\a\ladybird\ladybird/.ccache"
Run actions/cache/save@v4
"C:\Program Files\Git\usr\bin\tar.exe" --posix -cf cache.tzst --exclude cache.tzst -P -C C:/a/ladybird/ladybird --files-from manifest.txt --force-local --use-compress-program "zstd -T0"
Sent 0 of 676688232 (0.0%), 0.0 MBs/sec
Sent 0 of 676688232 (0.0%), 0.0 MBs/sec
Sent 475361640 of 676688232 (70.2%), 150.9 MBs/sec
Sent 676688232 of 676688232 (100.0%), 171.5 MBs/sec
Cache saved with key: "ccache" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040344_26
Run $env:CCACHE_DIR = "C:\a\ladybird\ladybird/.ccache"
Cacheable calls:    2591 / 2591 (100.0%)
  Hits:                0 / 2591 ( 0.00%)
    Direct:            0
    Preprocessed:      0
  Misses:           2591 / 2591 (100.0%)
Local storage:
  Cache size (GiB):  0.8
  Hits:                0 / 2591 ( 0.00%)
  Misses:           2591 / 2591 (100.0%)
Run actions/cache/save@v4
"C:\Program Files\Git\usr\bin\tar.exe" --posix -cf cache.tzst --exclude cache.tzst -P -C C:/a/ladybird/ladybird --files-from manifest.txt --force-local --use-compress-program "zstd -T0"
Sent 0 of 850387929 (0.0%), 0.0 MBs/sec
Sent 0 of 850387929 (0.0%), 0.0 MBs/sec
Sent 536870912 of 850387929 (63.1%), 170.6 MBs/sec
Sent 850387929 of 850387929 (100.0%), 214.3 MBs/sec
Cache saved with key: "vcpkg" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040344_26

Second run

Overall build time: 11m 47s

https://github.com/LadybirdBrowser/ladybird/actions/runs/16715055691/job/47306842805?pr=5696

Cache Restore

Prepare all required actions
Getting action download info
Download immutable action package 'actions/cache@v4'
Run ./.github/actions/cache-restore
Run echo "timestamp=$(date -u "+%Y%m%d%H%M_%S")" >> "$GITHUB_OUTPUT"
Run actions/cache/restore@v4
Cache hit for: "ccache" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040547_03
Received 138412032 of 676688232 (20.5%), 131.9 MBs/sec
Received 335544320 of 676688232 (49.6%), 157.6 MBs/sec
Received 536870912 of 676688232 (79.3%), 159.1 MBs/sec
Received 676688232 of 676688232 (100.0%), 158.6 MBs/sec
Cache Size: ~645 MB (676688232 B)
"C:\Program Files\Git\usr\bin\tar.exe" -xf C:/a/_temp/a8921d5c-45b6-4104-812d-4cba97680eca/cache.tzst -P -C C:/a/ladybird/ladybird --force-local --use-compress-program "zstd -d"
Cache restored successfully
Cache restored from key: "ccache" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040344_26
Run $env:CCACHE_DIR = "C:\a\ladybird\ladybird/.ccache"
Unset cache size limit
Cacheable calls:    2591 / 2591 (100.0%)
  Hits:                0 / 2591 ( 0.00%)
    Direct:            0
    Preprocessed:      0
  Misses:           2591 / 2591 (100.0%)
Local storage:
  Cache size (GiB):  0.8
  Hits:                0 / 2591 ( 0.00%)
  Misses:           2591 / 2591 (100.0%)
Statistics zeroed
Run actions/cache/restore@v4
Cache hit for: "vcpkg" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040547_03
Received 163577856 of 850387929 (19.2%), 152.0 MBs/sec
Received 369098752 of 850387929 (43.4%), 173.7 MBs/sec
Received 536870912 of 850387929 (63.1%), 165.6 MBs/sec
Received 742391808 of 850387929 (87.3%), 171.0 MBs/sec
Received 850387929 of 850387929 (100.0%), 169.3 MBs/sec
Cache Size: ~811 MB (850387929 B)
"C:\Program Files\Git\usr\bin\tar.exe" -xf C:/a/_temp/d755558a-a299-41bc-937b-7f3dcdce74d8/cache.tzst -P -C C:/a/ladybird/ladybird --force-local --use-compress-program "zstd -d"
Cache restored successfully
Cache restored from key: "vcpkg" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040344_26

Cache Save

Prepare all required actions
Getting action download info
Run ./.github/actions/cache-save
Run $env:CCACHE_DIR = "C:\a\ladybird\ladybird/.ccache"
  
Run actions/cache/save@v4
  
"C:\Program Files\Git\usr\bin\tar.exe" --posix -cf cache.tzst --exclude cache.tzst -P -C C:/a/ladybird/ladybird --files-from manifest.txt --force-local --use-compress-program "zstd -T0"
Sent 0 of 677304768 (0.0%), 0.0 MBs/sec
Sent 543087040 of 677304768 (80.2%), 259.0 MBs/sec
Sent 677304768 of 677304768 (100.0%), 221.8 MBs/sec
Cache saved with key: "ccache" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040547_03
Run $env:CCACHE_DIR = "C:\a\ladybird\ladybird/.ccache"
  
Cacheable calls:    2591 / 2591 (100.0%)
  Hits:             2589 / 2591 (99.92%)
    Direct:         2589 / 2589 (100.0%)
    Preprocessed:      0 / 2589 ( 0.00%)
  Misses:              2 / 2591 ( 0.08%)
Local storage:
  Cache size (GiB):  0.8
  Cleanups:            2
  Hits:             2589 / 2591 (99.92%)
  Misses:              2 / 2591 ( 0.08%)
Run actions/cache/save@v4
  
"C:\Program Files\Git\usr\bin\tar.exe" --posix -cf cache.tzst --exclude cache.tzst -P -C C:/a/ladybird/ladybird --files-from manifest.txt --force-local --use-compress-program "zstd -T0"
Sent 0 of 850388093 (0.0%), 0.0 MBs/sec
Sent 536870912 of 850388093 (63.1%), 255.0 MBs/sec
Sent 716170365 of 850388093 (84.2%), 227.0 MBs/sec
Sent 850388093 of 850388093 (100.0%), 265.1 MBs/sec
Cache saved with key: "vcpkg" | "Windows" | "x86_64" | "ClangCL" | "Windows_Sanitizer_CI" | "0" | 202508040547_03