/*
This example shows asynchronous execution, non-blocking code.
console.log(contents); blocks process and that's why
console.log('Do something else!'); must wait
Successfully loads files up to 1000MB.
*/
//load modules
var fs = require('fs');
//asynchronous file reading
fs.readFile('./testfiles/largefile1000mb.txt', function(err, content){
console.log(content);
});
//here process is not blocked. While file is loading the next console.log(); continue with execution
console.log('Do something else!');
/*
Conclusion: Due to asynchronous execution, first appear 'Do something else' then is file dumped.
*/
Do something else! undefined
$ps -aux | grep node (list all node processes) sasa 1208 0.3 0.2 1309344 47536 ? Ssl 2025 1705:24 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.4 11853548 76204 ? Ssl 2025 2693:22 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.2 1305496 45296 ? Ssl 2025 1726:29 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.2 1301856 42020 ? Ssl 2025 1700:02 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.2 12267832 527036 ? Ssl 2025 21752:37 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 8.2 4.2 12377424 697276 ? Ssl 2025 42493:10 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. www-data 411907 0.0 0.0 2608 532 ? S 23:59 0:00 sh -c ps -aux | grep node www-data 411909 0.0 0.0 3304 708 ? S 23:59 0:00 grep node sasa 1214480 0.3 0.5 22311168 91324 ? Ssl 2025 1519:25 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.2 1101568 34696 ? Ssl 2025 1401:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.2 1101060 35000 ? Ssl 2025 1399:25 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.2 1102312 35272 ? Ssl 2025 1411:08 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.2 1102340 35252 ? Ssl 2025 1404:08 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.2 1102208 35848 ? Ssl 2025 1399:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.2 1167976 35152 ? Ssl 2025 1390:36 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.2 1100128 33104 ? Ssl 2025 1383:48 node /home/sasa/dex8/dex8-worker/starter.js sasa 1216489 0.3 0.2 1101560 34212 ? Ssl 2025 1399:57 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.5 11821176 91576 ? Ssl Apr20 2253:19 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.6 0.3 1304320 56960 ? Ssl May31 1248:32 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.3 11798848 55780 ? Ssl Aug15 415:45 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2072475 0.7 0.5 1164404 94664 ? Ssl Sep24 231:52 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2075109 7.4 0.5 11712096 95100 ? Ssl Sep24 2381:29 node /home/sasa/dex8/dex8-api/starter.js sasa 2075416 0.6 0.3 1332304 58928 ? Ssl Sep24 209:31 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 2448036 1.1 0.9 11889624 152172 ? Ssl Aug21 966:29 node /home/sasa/miko/miko-hr/server/index.js sasa 2663246 2.2 0.6 11846300 100948 ? Ssl Aug23 1729:39 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.4 11831508 77092 ? Ssl 2025 3056:09 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.3 11799488 53956 ? Ssl 2025 2507:26 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3615181 0.6 0.3 1331896 64164 ? Ssl Oct07 84:59 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.4 22302920 79520 ? Ssl Sep02 229:11 node /home/sasa/dex8/dex8-worker/starter.js