[vs18.6] Fix cross-AppDomain TaskItem modifier cache regression#13515
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rainersigwald merged 4 commits intovs18.6from Apr 21, 2026
Merged
[vs18.6] Fix cross-AppDomain TaskItem modifier cache regression#13515rainersigwald merged 4 commits intovs18.6from
rainersigwald merged 4 commits intovs18.6from
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Recently, ItemSpecModifiers.GetItemSpecModifier was changed to take a Cache struct rather than a single "string? fullPath" parameter. Unfortunately, this increases memory allocations to an unexpected degree -- especially in cross-AppDomain scenarios. This change reduces the size of the Cache struct to just a single FullPath field, which should remove the allocation regression.
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@copilot bump version to 18.6.2 |
Agent-Logs-Url: https://github.com/dotnet/msbuild/sessions/5ac98ead-0a36-4208-b54e-b451a8372fc9 Co-authored-by: JanProvaznik <25267098+JanProvaznik@users.noreply.github.com>
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Description
https://dev.azure.com/devdiv/DevDiv/_workitems/edit/2860443/
Recently,
ItemSpecModifiers.GetItemSpecModifierwas changed to take aCachestruct rather than a single "string? fullPath" parameter. Unfortunately, this increases memory allocations to an unexpected degree -- especially in cross-AppDomain scenarios. This change reduces the size of the Cache struct to just a single FullPath field, which removes the allocation regression.Customer Impact
caught by automated VS perf tests to cause 100s of MB extra allocations
Regression? (was it working in a previous release or preview?)
Yes
Risk (see taxonomy)
Low
Link the PR to the original issue and to the PR to main.
Backport of #13493 to vs18.6