/*
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 1305540 83344 ? Ssl 2025 1239:12 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1208 0.3 0.4 1305000 73724 ? Ssl 2025 891:54 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1224 0.7 0.6 11819720 107136 ? Ssl 2025 2010:11 node /home/sasa/dex8/dex8-www/server/index.js sasa 1236 0.5 0.6 11818512 107820 ? Ssl 2025 1411:18 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1305176 73164 ? Ssl 2025 905:09 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1297836 67208 ? Ssl 2025 890:17 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.5 2.8 12155772 465672 ? Ssl 2025 11572:49 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 3.8 2.6 12100072 432920 ? Ssl 2025 9612:51 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 356539 0.5 0.6 11829092 102848 ? Ssl Apr11 48:09 node /home/sasa/miko/miko-hr/server/index.js sasa 1004233 0.3 0.3 1098848 63604 ? Ssl 04:02 2:03 node /home/sasa/dex8/dex8-worker/starter.js www-data 1051064 0.0 0.0 2608 528 ? S 14:28 0:00 sh -c ps -aux | grep node www-data 1051066 0.0 0.0 3304 652 ? S 14:28 0:00 grep node sasa 1214480 0.3 0.7 22311168 126100 ? Ssl 2025 616:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101312 65420 ? Ssl 2025 538:43 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101060 65916 ? Ssl 2025 537:27 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1101032 65648 ? Ssl 2025 541:15 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102596 66300 ? Ssl 2025 538:37 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102464 67696 ? Ssl 2025 537:12 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1100648 64480 ? Ssl 2025 529:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100384 63932 ? Ssl 2025 527:24 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.6 0.7 11709880 124428 ? Ssl 2025 1065:26 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.4 1103096 66840 ? Ssl 2025 536:42 node /home/sasa/dex8/dex8-worker/starter.js sasa 2628167 0.8 0.8 1178968 131544 ? Ssl 2025 2021:40 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.5 11801592 91180 ? Ssl 2025 1453:27 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799176 85408 ? Ssl 2025 1200:11 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1332468 85836 ? Ssl Feb21 542:35 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js