/*
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 0.4 0.5 1306216 84876 ? Ssl 2025 1464:40 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1208 0.3 0.4 1305000 72292 ? Ssl 2025 1042:10 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11820752 106956 ? Ssl 2025 1646:31 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1304920 72600 ? Ssl 2025 1056:52 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1297836 67384 ? Ssl 2025 1040:48 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.5 2.7 12154236 450332 ? Ssl 2025 13543:26 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 4.7 3.4 12221156 563184 ? Ssl 2025 14280:14 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 426910 0.3 0.4 1101660 65680 ? Ssl 04:02 3:29 node /home/sasa/dex8/dex8-worker/starter.js www-data 508116 0.0 0.0 2608 528 ? S 22:07 0:00 sh -c ps -aux | grep node www-data 508118 0.0 0.0 3304 648 ? S 22:07 0:00 grep node sasa 1214480 0.3 0.7 22311168 125860 ? Ssl 2025 785:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1101312 65672 ? Ssl 2025 698:49 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101060 66228 ? Ssl 2025 697:19 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1101544 66388 ? Ssl 2025 702:36 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1101316 64792 ? Ssl 2025 699:02 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.3 1100928 65200 ? Ssl 2025 696:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166184 64548 ? Ssl 2025 687:07 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.4 1101408 65804 ? Ssl 2025 684:38 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.7 0.8 11845212 131324 ? Ssl 2025 1506:35 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.3 1101816 65372 ? Ssl 2025 696:25 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.6 11806556 110356 ? Ssl Apr20 370:00 node /home/sasa/dex8/dex8-www/server/index.js sasa 1904154 0.6 0.6 11808568 99840 ? Ssl Apr25 222:16 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.8 0.8 1176920 132148 ? Ssl 2025 2372:10 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.5 11802824 92004 ? Ssl 2025 1733:37 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799176 84248 ? Ssl 2025 1440:14 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.7 0.5 1332492 85920 ? Ssl Feb21 896:45 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js