Experiments

Warning: Experimental features ahead! By enabling these features, you could lose browser data or compromise your security or privacy. Enabled features apply to all users of this browser. If you are an enterprise admin you should not be using these flags in production.

• Chrome heap profiler start mode.

  Starts heap profiling service that records sampled memory allocation profile having each sample attributed with a callstack. The sampling resolution is controlled with --memlog-sampling-rate flag. Recorded heap dumps can be obtained at chrome://tracing [category:memory-infra] and chrome://memory-internals. This setting controls which processes will be profiled since their start. To profile any given process at a later time use chrome://memory-internals page. – Mac, Windows, Linux, ChromeOS, Android

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  #memlog
  DisabledBrowser and GPUAll processesBrowser onlyGPU onlyAll renderersSingle renderer

• Heap profiling sampling interval (in bytes).

  Heap profiling service uses Poisson process to sample allocations. Default value for the interval between samples is 1000000 (1MB). This results in low noise for large and/or frequent allocations [size * frequency >> 1MB]. This means that aggregate numbers [e.g. total size of malloc-ed objects] and large and/or frequent allocations can be trusted with high fidelity. Lower intervals produce higher samples resolution, but come at a cost of higher performance overhead. – Mac, Windows, Linux, ChromeOS, Android

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  #memlog-sampling-rate
  Default10KB50KB100KB500KB1MB5MB

• Heap profiling stack traces type.

  By default heap profiling service records native stacks. A post-processing step is required to symbolize the stacks. 'Native with thread names' adds the thread name as the first frame of each native stack. It's also possible to record a pseudo stack using trace events as identifiers. It's also possible to do a mix of both. – Mac, Windows, Linux, ChromeOS, Android

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  #memlog-stack-mode
  DefaultNativeNative with thread names

• Omnibox Max URL Matches

  The maximum number of URL matches to show, unless there are no replacements. – Mac, Windows, Linux, ChromeOS, Android

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  #omnibox-max-url-matches
  DefaultEnabledEnabled 2 matchesEnabled 3 matchesEnabled 4 matchesEnabled 5 matchesEnabled 6 matchesDisabled

• Enable optimization guide debug logs

  Enables the optimization guide to log and save debug messages that can be shown in the internals page. – Mac, Windows, Linux, ChromeOS, Android

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  #optimization-guide-debug-logs
  DisabledEnabled

• Enables optimization guide on device

  Enables the optimization guide to execute models on device. – Mac, Windows, Linux, ChromeOS

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  #optimization-guide-on-device-model
  DefaultEnabledEnabled BypassPerfRequirementDisabled

• Text Safety Classifier

  Enables text safety classifier for on-device models – Mac, Windows, Linux, ChromeOS

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  #text-safety-classifier
  DefaultEnabledEnabled Executes safety classifier but no retraction of outputDisabled

• Organic repeatable queries in Most Visited tiles

  Enables showing the most repeated queries, from the device browsing history, organically among the most visited sites in the MV tiles. – Mac, Windows, Linux, ChromeOS, Android

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  #organic-repeatable-queries
  DefaultEnabledEnabled 6+ uses, once in last 90dEnabled 12+ uses, once in last 90dEnabled 6+ uses, once in last 7dEnabled 12+ uses, once in last 7dDisabled

• History Embeddings

  When enabled, the history embeddings feature may operate. – Mac, Windows, Linux, ChromeOS

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  #history-embeddings
  DefaultEnabledEnabled with AtKeywordAccelerationDisabled

• History Embeddings Answers

  When enabled, the history embeddings feature may answer some queries. Has no effect if the History Embeddings feature is disabled. – Mac, Windows, Linux, ChromeOS

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  #history-embeddings-answers
  DefaultEnabledDisabled