/*
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 1194 0.5 0.5 1304868 82864 ? Ssl 2025 597:51 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1208 0.3 0.4 1305000 72664 ? Ssl 2025 433:14 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1224 0.9 0.6 11824008 114004 ? Ssl 2025 1002:45 node /home/sasa/dex8/dex8-www/server/index.js sasa 1236 0.6 0.6 11817516 101292 ? Ssl 2025 682:42 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1255 0.8 0.5 1331116 84872 ? Ssl 2025 934:14 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 1257 0.4 0.4 1304920 72688 ? Ssl 2025 440:58 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1297916 67256 ? Ssl 2025 432:30 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.1 2.9 12164220 476132 ? Ssl 2025 4537:50 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 2.6 1.2 11894484 200284 ? Ssl 2025 2889:24 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.4 1101704 67468 ? Ssl 2025 49:31 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1101568 67716 ? Ssl 2025 49:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101828 67204 ? Ssl 2025 49:24 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1101800 66980 ? Ssl 2025 49:51 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102084 67280 ? Ssl 2025 49:31 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1101696 66980 ? Ssl 2025 49:22 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1099368 63800 ? Ssl 2025 48:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1099360 63544 ? Ssl 2025 48:29 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.5 0.7 11703792 117720 ? Ssl 2025 78:13 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.4 1101560 66984 ? Ssl 2025 49:15 node /home/sasa/dex8/dex8-worker/starter.js sasa 2221904 0.3 0.4 1101916 66328 ? Ssl 03:03 3:35 node /home/sasa/dex8/dex8-worker/starter.js www-data 2303833 0.0 0.0 2608 524 ? S 21:25 0:00 sh -c ps -aux | grep node www-data 2303835 0.0 0.0 3304 720 ? S 21:25 0:00 grep node sasa 2628167 0.9 0.8 1176208 132504 ? Ssl 2025 886:36 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.7 0.6 11824468 99500 ? Ssl 2025 637:54 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11798920 84236 ? Ssl 2025 464:22 node /home/sasa/@mikosoft/dodo-examples/server/index.js