@ -77,13 +77,17 @@ If set to 1 then colors will not be used in the REPL.
--use_strict (enforce strict mode)
type: bool default: false
--use_strong (enforce strong mode)
type: bool default: false
--strong_mode (experimental strong language mode)
type: bool default: false
--es_staging (enable all completed harmony features)
type: bool default: false
--harmony (enable all completed harmony features)
type: bool default: false
--harmony_shipping (enable all shipped harmony features)
type: bool default: true
--harmony_modules (enable "harmony modules (implies block scoping) " (in progress))
--harmony_modules (enable "harmony modules" (in progress))
type: bool default: false
--harmony_arrays (enable "harmony array methods" (in progress))
type: bool default: false
@ -99,20 +103,22 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: false
--harmony_unicode (enable "harmony unicode escapes" (in progress))
type: bool default: false
--harmony_unicode_regexps (enable "harmony unicode regexps" (in progress))
type: bool default: false
--harmony_rest_parameters (enable "harmony rest parameters" (in progress))
type: bool default: false
--harmony_reflect (enable "harmony Reflect API" (in progress))
type: bool default: false
--harmony_computed_property_names (enable "harmony computed property names")
type: bool default: false
--harmony_tostring (enable "harmony toString")
type: bool default: false
--harmony_numeric_literals (enable "harmony numeric literals")
type: bool default: true
--harmony_strings (enable "harmony string methods")
type: bool default: true
--harmony_scoping (enable "harmony block scoping")
type: bool default: true
--harmony_classes (enable "harmony classes (implies block scoping & object literal extension)")
--harmony_classes (enable "harmony classes (implies object literal extension)")
type: bool default: true
--harmony_object_literals (enable "harmony object literal extensions")
type: bool default: true
--harmony_templates (enable "harmony template literals")
type: bool default: true
--compiled_keyed_generic_loads (use optimizing compiler to generate keyed generic load stubs)
type: bool default: false
--pretenuring_call_new (pretenure call new)
@ -181,6 +187,8 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: false
--trace_check_elimination (trace check elimination phase)
type: bool default: false
--trace_environment_liveness (trace liveness of local variable slots)
type: bool default: false
--trace_hydrogen (trace generated hydrogen to file)
type: bool default: false
--trace_hydrogen_filter (hydrogen tracing filter)
@ -286,7 +294,7 @@ If set to 1 then colors will not be used in the REPL.
--concurrent_recompilation (optimizing hot functions asynchronously on a separate thread)
type: bool default: true
--job_based_recompilation (post tasks to v8::Platform instead of using a thread for concurrent recompilation)
type: bool default: fals e
type: bool default: tru e
--trace_concurrent_recompilation (track concurrent recompilation)
type: bool default: false
--concurrent_recompilation_queue_length (the length of the concurrent compilation queue)
@ -321,8 +329,12 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: false
--turbo_stats (print TurboFan statistics)
type: bool default: false
--turbo_splitting (split nodes during scheduling in TurboFan)
type: bool default: true
--turbo_types (use typed lowering in TurboFan)
type: bool default: true
--turbo_type_feedback (use type feedback in TurboFan)
type: bool default: false
--turbo_source_positions (track source code positions when building TurboFan IR)
type: bool default: false
--context_specialization (enable context specialization in TurboFan)
@ -331,21 +343,29 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: false
--turbo_inlining (enable inlining in TurboFan)
type: bool default: false
--turbo_inlining_intrinsics (enable inlining of intrinsics in TurboFan)
type: bool default: fals e
--turbo_builtin_inlining (enable builtin inlining in TurboFan)
type: bool default: tru e
--trace_turbo_inlining (trace TurboFan inlining)
type: bool default: false
--loop_assignment_analysis (perform loop assignment analysis)
type: bool default: true
--turbo_profiling (enable profiling in TurboFan)
type: bool default: false
--turbo_reuse_spill_slots (reuse spill slots in TurboFan)
type: bool default: true
--turbo_delay_ssa_decon (delay ssa deconstruction in TurboFan register allocator)
type: bool default: false
--turbo_verify_allocation (verify register allocation in TurboFan)
type: bool default: false
--turbo_move_optimization (optimize gap moves in TurboFan)
type: bool default: true
--turbo_jt (enable jump threading)
--turbo_jt (enable jump threading in TurboFan)
type: bool default: true
--turbo_osr (enable OSR in TurboFan)
type: bool default: true
--turbo_exceptions (enable exception handling in TurboFan)
type: bool default: false
--turbo_stress_loop_peeling (stress loop peeling optimization)
type: bool default: false
--turbo_cf_optimization (optimize control flow in TurboFan)
type: bool default: true
--typed_array_max_size_in_heap (threshold for in-heap typed array)
type: int default: 64
@ -395,8 +415,10 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: true
--enable_vldr_imm (enable use of constant pools for double immediate (ARM only))
type: bool default: false
--force_long_branches (force all emitted branches to be in long mode (MIPS only))
--force_long_branches (force all emitted branches to be in long mode (MIPS/PPC only))
type: bool default: false
--mcpu (enable optimization for specific cpu)
type: string default: auto
--expose_natives_as (expose natives in global object)
type: string default: NULL
--expose_debug_as (expose debug in global object)
@ -446,7 +468,7 @@ If set to 1 then colors will not be used in the REPL.
--serialize_toplevel (enable caching of toplevel scripts)
type: bool default: true
--serialize_inner (enable caching of inner functions)
type: bool default: fals e
type: bool default: tru e
--trace_serializer (print code serializer trace)
type: bool default: false
--min_preparse_length (minimum length for automatic enable preparsing)
@ -497,6 +519,8 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: false
--gc_interval (garbage collect after <n> allocations)
type: int default: -1
--retain_maps_for_n_gc (keeps maps alive for <n> old space garbage collections)
type: int default: 2
--trace_gc (print one trace line following each garbage collection)
type: bool default: false
--trace_gc_nvp (print one detailed trace line in name=value format after each garbage collection)
@ -513,7 +537,9 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: false
--trace_gc_verbose (print more details following each garbage collection)
type: bool default: false
--trace_fragmentation (report fragmentation for old pointer and data pages)
--trace_fragmentation (report fragmentation for old space)
type: bool default: false
--trace_fragmentation_verbose (report fragmentation for old space (detailed))
type: bool default: false
--collect_maps (garbage collect maps from which no objects can be reached)
type: bool default: true
@ -533,12 +559,22 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: true
--incremental_marking_steps (do incremental marking steps)
type: bool default: true
--overapproximate_weak_closure (overapproximate weak closer to reduce atomic pause time)
type: bool default: true
--min_progress_during_object_groups_marking (keep overapproximating the weak closure as long as we discover at least this many unmarked objects)
type: int default: 128
--max_object_groups_marking_rounds (at most try this many times to over approximate the weak closure)
type: int default: 3
--concurrent_sweeping (use concurrent sweeping)
type: bool default: true
--trace_incremental_marking (trace progress of the incremental marking)
type: bool default: false
--track_gc_object_stats (track object counts and memory usage)
type: bool default: false
--track_detached_contexts (track native contexts that are expected to be garbage collected)
type: bool default: true
--trace_detached_contexts (trace native contexts that are expected to be garbage collected)
type: bool default: false
--heap_profiler_trace_objects (Dump heap object allocations/movements/size_updates)
type: bool default: false
--use_idle_notification (Use idle notification to reduce memory footprint.)
@ -627,6 +663,12 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: false
--predictable (enable predictable mode)
type: bool default: false
--force_marking_deque_overflows (force overflows of marking deque by reducing it's size to 64 words)
type: bool default: false
--stress_compaction (stress the GC compactor to flush out bugs (implies --force_marking_deque_overflows))
type: bool default: false
--manual_evacuation_candidates_selection (Test mode only flag. It allows an unit test to select evacuation candidates pages (requires --stress_compaction).)
type: bool default: false
--help (Print usage message, including flags, on console)
type: bool default: true
--dump_counters (Dump counters on exit)
@ -637,18 +679,6 @@ If set to 1 then colors will not be used in the REPL.
type: string default:
--js_arguments (Pass all remaining arguments to the script. Alias for "--".)
type: arguments default:
--gdbjit (enable GDBJIT interface (disables compacting GC))
type: bool default: false
--gdbjit_full (enable GDBJIT interface for all code objects)
type: bool default: false
--gdbjit_dump (dump elf objects with debug info to disk)
type: bool default: false
--gdbjit_dump_filter (dump only objects containing this substring)
type: string default:
--force_marking_deque_overflows (force overflows of marking deque by reducing it's size to 64 words)
type: bool default: false
--stress_compaction (stress the GC compactor to flush out bugs (implies --force_marking_deque_overflows))
type: bool default: false
--log (Minimal logging (no API, code, GC, suspect, or handles samples).)
type: bool default: false
--log_all (Log all events to the log file.)
@ -667,6 +697,8 @@ If set to 1 then colors will not be used in the REPL.
type: bool default: false
--prof (Log statistical profiling information (implies --log-code).)
type: bool default: false
--prof_cpp (Like --prof, but ignore generated code.)
type: bool default: false
--prof_browser_mode (Used with --prof, turns on browser-compatible mode for profiling.)
type: bool default: true
--log_regexp (Log regular expression execution.)