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931a0d4634
Calling v8.setFlagsFromString with e.g a function as a flag argument gave no exception or warning that the function call will fail. There is now an exception if the function gets called with the wrong flag type (string is required) or that a flag is expected. Other APIs already provide exceptions if the argument has not the expected type. PR-URL: https://github.com/iojs/io.js/pull/1652 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
1.2 KiB
1.2 KiB
V8
Stability: 2 - Stable
This module exposes events and interfaces specific to the version of V8 built with io.js. These interfaces are subject to change by upstream and are therefore not covered under the stability index.
getHeapStatistics()
Returns an object with the following properties
{
total_heap_size: 7326976,
total_heap_size_executable: 4194304,
total_physical_size: 7326976,
used_heap_size: 3476208,
heap_size_limit: 1535115264
}
setFlagsFromString(string)
Set additional V8 command line flags. Use with care; changing settings after the VM has started may result in unpredictable behavior, including crashes and data loss. Or it may simply do nothing.
The V8 options available for a version of io.js may be determined by running
iojs --v8-options. An unofficial, community-maintained list of options
and their effects is available
here.
Usage:
// Print GC events to stdout for one minute.
var v8 = require('v8');
v8.setFlagsFromString('--trace_gc');
setTimeout(function() { v8.setFlagsFromString('--notrace_gc'); }, 60e3);