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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gin/gin_features.h"
#include "base/metrics/field_trial_params.h"
namespace features {
// Enables optimization of JavaScript in V8.
const base::Feature kV8OptimizeJavascript{"V8OptimizeJavascript",
base::FEATURE_ENABLED_BY_DEFAULT};
// Enables flushing of JS bytecode in V8.
const base::Feature kV8FlushBytecode{"V8FlushBytecode",
base::FEATURE_ENABLED_BY_DEFAULT};
// Enables finalizing streaming JS compilations on a background thread.
const base::Feature kV8OffThreadFinalization{"V8OffThreadFinalization",
base::FEATURE_ENABLED_BY_DEFAULT};
// Enables lazy feedback allocation in V8.
const base::Feature kV8LazyFeedbackAllocation{"V8LazyFeedbackAllocation",
base::FEATURE_ENABLED_BY_DEFAULT};
// Enables concurrent inlining in TurboFan.
const base::Feature kV8ConcurrentInlining{"V8ConcurrentInlining",
base::FEATURE_DISABLED_BY_DEFAULT};
// Enables per-context marking worklists in V8 GC.
const base::Feature kV8PerContextMarkingWorklist{
"V8PerContextMarkingWorklist", base::FEATURE_DISABLED_BY_DEFAULT};
// Enables flushing of the instruction cache for the embedded blob.
const base::Feature kV8FlushEmbeddedBlobICache{
"V8FlushEmbeddedBlobICache", base::FEATURE_DISABLED_BY_DEFAULT};
// Enables reduced number of concurrent marking tasks.
const base::Feature kV8ReduceConcurrentMarkingTasks{
"V8ReduceConcurrentMarkingTasks", base::FEATURE_DISABLED_BY_DEFAULT};
// Disables reclaiming of unmodified wrappers objects.
const base::Feature kV8NoReclaimUnmodifiedWrappers{
"V8NoReclaimUnmodifiedWrappers", base::FEATURE_DISABLED_BY_DEFAULT};
// Enables concurrent heap access and allocation.
const base::Feature kV8LocalHeaps{"V8LocalHeaps",
base::FEATURE_ENABLED_BY_DEFAULT};
// Enables TurboFan's direct heap access.
const base::Feature kV8TurboDirectHeapAccess{"V8TurboDirectHeapAccess",
base::FEATURE_ENABLED_BY_DEFAULT};
// Enables fallback to a breadth-first regexp engine on excessive backtracking.
const base::Feature kV8ExperimentalRegexpEngine{
"V8ExperimentalRegexpEngine", base::FEATURE_ENABLED_BY_DEFAULT};
// Enables experimental Turboprop compiler.
const base::Feature kV8Turboprop{"V8Turboprop",
base::FEATURE_DISABLED_BY_DEFAULT};
// Enables Sparkplug compiler. Note that this only sets the V8 flag when
// manually overridden; otherwise it defers to whatever the V8 default is.
const base::Feature kV8Sparkplug{"V8Sparkplug",
base::FEATURE_ENABLED_BY_DEFAULT};
// Makes sure the experimental Sparkplug compiler is only enabled if short
// builtin calls are enabled too.
const base::Feature kV8SparkplugNeedsShortBuiltinCalls{
"V8SparkplugNeedsShortBuiltinCalls", base::FEATURE_DISABLED_BY_DEFAULT};
// Enables short builtin calls feature.
const base::Feature kV8ShortBuiltinCalls{"V8ShortBuiltinCalls",
base::FEATURE_ENABLED_BY_DEFAULT};
// Enables fast API calls in TurboFan.
const base::Feature kV8TurboFastApiCalls{"V8TurboFastApiCalls",
base::FEATURE_DISABLED_BY_DEFAULT};
// Enables untrusted code mitigations.
const base::Feature kV8UntrustedCodeMitigations{
"V8UntrustedCodeMitigations", base::FEATURE_DISABLED_BY_DEFAULT};
// Artificially delays script execution.
const base::Feature kV8ScriptAblation{"V8ScriptAblation",
base::FEATURE_DISABLED_BY_DEFAULT};
const base::FeatureParam<int> kV8ScriptDelayOnceMs{&kV8ScriptAblation,
"V8ScriptDelayOnceMs", 0};
const base::FeatureParam<int> kV8ScriptDelayMs{&kV8ScriptAblation,
"V8ScriptDelayMs", 0};
const base::FeatureParam<double> kV8ScriptDelayFraction{
&kV8ScriptAblation, "V8ScriptDelayFraction", 0.0};
// Experiment to determine the maximum size of the ArrayBuffer cage.
const base::Feature kV8ArrayBufferCageReservationExperiment{
"V8ArrayBufferCageReservationExperiment",
base::FEATURE_DISABLED_BY_DEFAULT};
// Enables slow histograms that provide detailed information at increased
// runtime overheads.
const base::Feature kV8SlowHistograms{"V8SlowHistograms",
base::FEATURE_DISABLED_BY_DEFAULT};
} // namespace features
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