javascript / intermediate
Snippet
Precise Timing with Performance Hooks
For intermediate profiling, use the Performance API. Unlike Date.now(), it provides high-resolution timestamps and structured measurements that can be consumed by monitoring tools.
snippet.js
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import { performance } from 'node:perf_hooks';performance.mark('start-process');// Heavy computation hereperformance.mark('end-process');performance.measure('ProcessDuration', 'start-process', 'end-process');const [measure] = performance.getEntriesByName('ProcessDuration');console.log(`Execution time: ${measure.duration.toFixed(2)}ms`);
nodejs
Breakdown
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performance.mark(name)
Creates a timestamped marker in the performance timeline.
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performance.measure(name, start, end)
Calculates the time difference between two named markers.