Reuse bool box objects in UncommonField<bool>.SetValue #6528
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In some scenarios, these UncommonField<bool>s end up being set very frequently, and each time the value being passed in gets boxed. We can avoid that by caching and reusing a box for each of the only two possible values (though it looks like the default value is almost always false and so it mainly only boxes true).
ghost
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ghost
requested review from
src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/UncommonField.cs
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lindexi
reviewed
May 5, 2022
src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/UncommonField.cs
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dipeshmsft
approved these changes
May 20, 2022
This was referenced Jun 9, 2022
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Description
In some scenarios, these UncommonFields end up being set very frequently, and each time the value being passed in gets boxed. We can avoid that by caching and reusing a box for each of the only two possible values (though it looks like the default value is almost always false and so it mainly only boxes true).
Customer Impact
Unnecessary allocation
Regression
No
Testing
CI
Risk
Minimal.
Microsoft Reviewers: Open in CodeFlow