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Switch to a List as the backing store for the FAR window from an ImmutableList. #73589

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merged 2 commits into from
May 20, 2024

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@CyrusNajmabadi CyrusNajmabadi commented May 20, 2024

Followup to #73587.

Saves several percent on looking up into the immutable array. As well as all hte overhead involved just mutating hte immutable-list (which is an AVL tree under the covers):

image

@dotnet-issue-labeler dotnet-issue-labeler bot added Area-IDE untriaged Issues and PRs which have not yet been triaged by a lead labels May 20, 2024
@CyrusNajmabadi CyrusNajmabadi changed the title Switch FAR data from an immutable dictionary to an immutable array @CyrusNajmabadi Switch to a List as the backing store for the FAR window from an ImmutableList. May 20, 2024
@CyrusNajmabadi CyrusNajmabadi changed the title @CyrusNajmabadi Switch to a List as the backing store for the FAR window from an ImmutableList. Switch to a List as the backing store for the FAR window from an ImmutableList. May 20, 2024
? EntriesWhenGroupingByDefinition
: EntriesWhenNotGroupingByDefinition;
? EntriesWhenGroupingByDefinition.ToImmutableArray()
: EntriesWhenNotGroupingByDefinition.ToImmutableArray();
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here we make a snapshot to actually put into TableEntriesSnapshot. But this should be ok the vast majority of hte time. We're only updating this snapshot at most 4 times a second. So the amount of copies made by this is very small (didn't show up in any measurements). And the wins we get by just working with List vs an ImmutableList (which internally is an AVL tree) is substantive.

@CyrusNajmabadi CyrusNajmabadi marked this pull request as ready for review May 20, 2024 19:47
@CyrusNajmabadi CyrusNajmabadi requested a review from a team as a code owner May 20, 2024 19:47
@CyrusNajmabadi CyrusNajmabadi requested a review from ToddGrun May 20, 2024 19:47
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:shipit:

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