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[CP-beta] Starts looking for the bdf fast path in relation to the snapshot_entity's transform #157060

@gaaclarke

Description

@gaaclarke

Issue Link

#156871

Target

beta

Cherry pick PR Link

flutter/engine#55917

Changelog Description

Fixes a rendering performance regression for users of BackdropFilter on Impeller iOS and Android where small filters were being rendered as large filters.

Impacted Users

all users that use backdrop filter blurs

Impact Description

Possible visible framerate drop and lower battery life.

Workaround

None.

Risk

low

Test Coverage

yes

Validation Steps

Run the backdrop_filter_perf* devicelab benchmarks before and after.

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cp: approvedApproved cherry-pick requestcp: mergedCherry-pick has been merged to the release branch.cp: reviewCherry-picks in the review queue

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