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Since setting object properties in C++ can be slow, pass data to JS using preallocated smalloc buffer and create object in JS instead. PR-URL: https://github.com/iojs/io.js/pull/469 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Trevor Norris <trev.norris@gmail.com>
44 lines
1.8 KiB
JavaScript
44 lines
1.8 KiB
JavaScript
// Copyright (c) 2014, StrongLoop Inc.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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'use strict';
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var v8binding = process.binding('v8');
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var smalloc = require('smalloc');
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var heapStatisticsBuffer = smalloc.alloc(v8binding.kHeapStatisticsBufferLength,
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v8binding.kHeapStatisticsBufferType);
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var kTotalHeapSizeIndex = v8binding.kTotalHeapSizeIndex;
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var kTotalHeapSizeExecutableIndex = v8binding.kTotalHeapSizeExecutableIndex;
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var kTotalPhysicalSizeIndex = v8binding.kTotalPhysicalSizeIndex;
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var kUsedHeapSizeIndex = v8binding.kUsedHeapSizeIndex;
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var kHeapSizeLimitIndex = v8binding.kHeapSizeLimitIndex;
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exports.getHeapStatistics = function() {
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var buffer = heapStatisticsBuffer;
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v8binding.getHeapStatistics(buffer);
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return {
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'total_heap_size': buffer[kTotalHeapSizeIndex],
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'total_heap_size_executable': buffer[kTotalHeapSizeExecutableIndex],
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'total_physical_size': buffer[kTotalPhysicalSizeIndex],
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'used_heap_size': buffer[kUsedHeapSizeIndex],
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'heap_size_limit': buffer[kHeapSizeLimitIndex]
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};
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};
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exports.setFlagsFromString = v8binding.setFlagsFromString;
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