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James M Snell
bcdd228f90
Add a sampling-based event loop delay monitor.
```js
const { monitorEventLoopDelay } = require('perf_hooks');
const h = monitorEventLoopDelay();
h.enable();
h.disable();
console.log(h.percentiles);
console.log(h.min);
console.log(h.max);
console.log(h.mean);
console.log(h.stddev);
console.log(h.percentile(50));
```
PR-URL: https://github.com/nodejs/node/pull/25378
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
39 lines
832 B
C++
39 lines
832 B
C++
#ifndef SRC_HISTOGRAM_H_
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#define SRC_HISTOGRAM_H_
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#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#include "hdr_histogram.h"
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#include <functional>
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#include <map>
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namespace node {
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class Histogram {
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public:
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inline Histogram(int64_t lowest, int64_t highest, int figures = 3);
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inline virtual ~Histogram();
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inline bool Record(int64_t value);
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inline void Reset();
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inline int64_t Min();
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inline int64_t Max();
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inline double Mean();
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inline double Stddev();
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inline double Percentile(double percentile);
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inline void Percentiles(std::function<void(double, double)> fn);
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size_t GetMemorySize() const {
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return hdr_get_memory_size(histogram_);
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}
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private:
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hdr_histogram* histogram_;
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};
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} // namespace node
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#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#endif // SRC_HISTOGRAM_H_
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