d3 Flamegraphs implementation #177
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| } | ||
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| $this->_visited = $this->_nodes = $this->_links = array(); | ||
| $flamegraph = $this->_flamegraphData (self::NO_PARENT, $main, $metric, $threshold); |
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Indentation looks a bit funny here.
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I've tidied code identation, also fixed up search in graph. To be honest I haven't checked javascript at all initially, basically I've just reused the example from http://martinspier.io/d3-flame-graph/ - I've changed obvious bits to use jQuery instead in this update. |
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Thanks! Merged and tagged in 0.7.0. |
Krinkle
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Sep 23, 2018
This unfortunately never worked correctly due to a fundamental limitation with the XHProf data format, which is that it only records metadata per parent-child method combination, it cannot be used to build a complete call tree. The feature was added in pull perftools#177. More information about this limitation is described in detail at perftools#219, perftools#216 and perftools#212. A brief summary: * The visualisation showed callstacks that did not actually exist, and was missing callstacks that did exist. (Due to assuming that every combination of a parent-child pair is valid, and due to it randomly assinging repeated calls to the first encountered parent.) * The visualisation discarded all timing values from XHProf, except for the timing of leaf nodes (methods without children), which were then added up recursively. The end result was a visually well-balanced tree, but with timing values that were not related to the actual performance (upto 100x inflated), and the proportions were incorrect as well, making some code look fast instead of slow, and vice versa. These are inherent problems that cannot be solved because the information logically required to make a flamegraph (call stacks) is not collected by XHProf. This closes perftools#216, perftools#212, perftools#211, perftools#207. This fixes perftools#212.
Krinkle
added a commit
to Krinkle/xhgui
that referenced
this pull request
Sep 23, 2018
This unfortunately never worked correctly due to a fundamental limitation with the XHProf data format, which is that it only records metadata per parent-child method combination, it cannot be used to build a complete call tree. The feature was added in pull perftools#177. More information about this limitation is described in detail at perftools#219, perftools#216 and perftools#212. A brief summary: * The visualisation showed callstacks that did not actually exist, and was missing callstacks that did exist. (Due to assuming that every combination of a parent-child pair is valid, and due to it randomly assinging repeated calls to the first encountered parent.) * The visualisation discarded all timing values from XHProf, except for the timing of leaf nodes (methods without children), which were then added up recursively. The end result was a visually well-balanced tree, but with timing values that were not related to the actual performance (upto 100x inflated), and the proportions were incorrect as well, making some code look fast instead of slow, and vice versa. These are inherent problems that cannot be solved because the information logically required to make a flamegraph (call stacks) is not collected by XHProf. This closes perftools#216, perftools#212, perftools#211, perftools#207. This fixes perftools#212.
Krinkle
added a commit
to Krinkle/xhgui
that referenced
this pull request
Sep 23, 2018
This unfortunately never worked correctly due to a fundamental limitation with the XHProf data format, which is that it only records metadata per parent-child method combination, it cannot be used to build a complete call tree. The feature was added in pull perftools#177. More information about this limitation is described in detail at perftools#219, perftools#216 and perftools#212. A brief summary: * The visualisation showed callstacks that did not actually exist, and was missing callstacks that did exist. (Due to assuming that every combination of a parent-child pair is valid, and due to it randomly assinging repeated calls to the first encountered parent.) * The visualisation discarded all timing values from XHProf, except for the timing of leaf nodes (methods without children), which were then added up recursively. The end result was a visually well-balanced tree, but with timing values that were not related to the actual performance (upto 100x inflated), and the proportions were incorrect as well, making some code look fast instead of slow, and vice versa. These are inherent problems that cannot be solved because the information logically required to make a flamegraph (call stacks) is not collected by XHProf. This closes perftools#212, perftools#211, perftools#207. This fixes perftools#212.
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Quick & dirty implementation of http://martinspier.io/d3-flame-graph/