pulsebridge-app/scripts/analyse_poll_intervals

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2024-03-07 01:32:21 +05:30
#!/usr/bin/env node
/*
* Analyse poll requests from the demo server to see if cht-gateway is waking
* up as expected on a particular device.
*
* Use:
* curl https://medic-gateway-demo-server.herokuapp.com/ | jq -r '.datastore.requests[].time' | scripts/analyse_poll_intervals
*
* Options:
* -d <num> | --discard=<num> number of timestamps to discard from the start of the list
*/
const SS = require('simple-statistics');
const readline = require('readline');
const rl = readline.createInterface({ input: process.stdin });
//> PROCESS ARGS
var i, discard = 0;
for(i=0; i<process.argv.length; ++i) {
arg = process.argv[i];
if(arg === '-d') {
discard = parseInt(process.argv[++i], 10);
} else if(~arg.indexOf('--discard=')) {
discard = parseInt(arg.substring(10));
}
}
function report(title, diffs) {
console.log('-----');
console.log('- ' + title);
console.log('Diffs: ' + diffs);
console.log('');
console.log('Min: ' + SS.min(diffs) + 's');
console.log('Max: ' + SS.max(diffs) + 's');
console.log('');
console.log('Mean: ' + SS.mean(diffs).toFixed(2) + 's');
console.log('Mode: ' + SS.mode(diffs) + 's');
console.log('Median: ' + SS.median(diffs) + 's');
console.log('');
console.log('Standard deviation: ' + SS.standardDeviation(diffs).toFixed(3) + 's');
console.log('-----');
}
const timestamps = [];
rl.on('line', (line) => {
timestamps.unshift(new Date(line).getTime());
});
rl.on('close', () => {
// If user has requested to discard some of the early timestamps, do this now.
// This is useful if the initial timestamps are anomalous.
while(discard--) timestamps.shift();
const single_diffs = [], double_diffs = [];
var i;
for(i=1; i<timestamps.length; ++i) {
single_diffs[i-1] = (timestamps[i] - timestamps[i-1]) / 1000;
if(i > 1)
double_diffs[i-2] = (timestamps[i] - timestamps[i-2]) / 1000;
}
console.log('Timestamps: ' + timestamps.length);
report('SINGLE DIFFS', single_diffs);
report('DOUBLE DIFFS', double_diffs);
console.log('Finished.');
});