aa2c33126c
This is an effort to reuse profiler data processing code both in TickProcessor and Dev Tools Profiler. The old Python implementation will be removed. The new TickProcessor works almost identical to the previous one. However, it has some differences: 1. Not very useful "Call profile" section is replaced with a new WebKit-like "Bottom up (heavy) profile" which shows the most expensive functions together with their callers. I used it personally in order to find and remove bottlenecks in the tickprocessor script itself, and found it quite helpful. 2. Code entries with duplicate names (they occur for RegExes, stubs and sometimes for anonymous Function objects) are now distinguished by adding an occurence number inside curly brackets. 3. (Address -> code entry) mapping is more precise in boundary cases. 4. Windows version no more requires specifying .map file location. 5. Works faster. Review URL: http://codereview.chromium.org/99054 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1802 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
94 lines
3.1 KiB
JavaScript
94 lines
3.1 KiB
JavaScript
// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/**
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* Constructs a ConsArray object. It is used mainly for tree traversal.
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* In this use case we have lots of arrays that we need to iterate
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* sequentally. The internal Array implementation is horribly slow
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* when concatenating on large (10K items) arrays due to memory copying.
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* That's why we avoid copying memory and insead build a linked list
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* of arrays to iterate through.
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*
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* @constructor
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*/
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function ConsArray() {
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this.tail_ = new ConsArray.Cell(null, null);
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this.currCell_ = this.tail_;
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this.currCellPos_ = 0;
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};
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/**
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* Concatenates another array for iterating. Empty arrays are ignored.
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* This operation can be safely performed during ongoing ConsArray
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* iteration.
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*
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* @param {Array} arr Array to concatenate.
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*/
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ConsArray.prototype.concat = function(arr) {
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if (arr.length > 0) {
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this.tail_.data = arr;
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this.tail_ = this.tail_.next = new ConsArray.Cell(null, null);
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}
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};
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/**
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* Whether the end of iteration is reached.
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*/
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ConsArray.prototype.atEnd = function() {
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return this.currCell_ === null ||
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this.currCell_.data === null ||
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this.currCellPos_ >= this.currCell_.data.length;
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};
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/**
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* Returns the current item, moves to the next one.
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*/
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ConsArray.prototype.next = function() {
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var result = this.currCell_.data[this.currCellPos_++];
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if (this.currCellPos_ >= this.currCell_.data.length) {
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this.currCell_ = this.currCell_.next;
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this.currCellPos_ = 0;
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}
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return result;
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};
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/**
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* A cell object used for constructing a list in ConsArray.
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*
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* @constructor
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*/
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ConsArray.Cell = function(data, next) {
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this.data = data;
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this.next = next;
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};
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