70 lines
2 KiB
Text
70 lines
2 KiB
Text
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#!/usr/bin/env node
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/*
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* Analyse poll requests from the demo server to see if cht-gateway is waking
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* up as expected on a particular device.
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*
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* Use:
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* curl https://medic-gateway-demo-server.herokuapp.com/ | jq -r '.datastore.requests[].time' | scripts/analyse_poll_intervals
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*
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* Options:
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* -d <num> | --discard=<num> number of timestamps to discard from the start of the list
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*/
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const SS = require('simple-statistics');
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const readline = require('readline');
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const rl = readline.createInterface({ input: process.stdin });
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//> PROCESS ARGS
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var i, discard = 0;
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for(i=0; i<process.argv.length; ++i) {
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arg = process.argv[i];
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if(arg === '-d') {
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discard = parseInt(process.argv[++i], 10);
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} else if(~arg.indexOf('--discard=')) {
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discard = parseInt(arg.substring(10));
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}
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}
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function report(title, diffs) {
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console.log('-----');
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console.log('- ' + title);
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console.log('Diffs: ' + diffs);
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console.log('');
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console.log('Min: ' + SS.min(diffs) + 's');
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console.log('Max: ' + SS.max(diffs) + 's');
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console.log('');
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console.log('Mean: ' + SS.mean(diffs).toFixed(2) + 's');
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console.log('Mode: ' + SS.mode(diffs) + 's');
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console.log('Median: ' + SS.median(diffs) + 's');
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console.log('');
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console.log('Standard deviation: ' + SS.standardDeviation(diffs).toFixed(3) + 's');
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console.log('-----');
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}
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const timestamps = [];
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rl.on('line', (line) => {
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timestamps.unshift(new Date(line).getTime());
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});
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rl.on('close', () => {
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// If user has requested to discard some of the early timestamps, do this now.
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// This is useful if the initial timestamps are anomalous.
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while(discard--) timestamps.shift();
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const single_diffs = [], double_diffs = [];
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var i;
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for(i=1; i<timestamps.length; ++i) {
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single_diffs[i-1] = (timestamps[i] - timestamps[i-1]) / 1000;
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if(i > 1)
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double_diffs[i-2] = (timestamps[i] - timestamps[i-2]) / 1000;
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}
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console.log('Timestamps: ' + timestamps.length);
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report('SINGLE DIFFS', single_diffs);
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report('DOUBLE DIFFS', double_diffs);
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console.log('Finished.');
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});
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