/*
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 1305752 87060 ? Ssl 2025 1408:47 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1208 0.3 0.4 1304488 72736 ? Ssl 2025 1001:25 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11817936 106492 ? Ssl 2025 1582:42 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1304920 73912 ? Ssl 2025 1015:39 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1298028 68036 ? Ssl 2025 1000:07 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.5 2.8 12177064 474124 ? Ssl 2025 13071:05 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 4.4 3.1 12171596 509776 ? Ssl 2025 12749:50 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 125324 ? Ssl 2025 739:32 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1103360 68120 ? Ssl 2025 655:31 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101060 66296 ? Ssl 2025 654:07 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.4 1101288 65756 ? Ssl 2025 658:55 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1101316 64784 ? Ssl 2025 655:36 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1100416 65732 ? Ssl 2025 653:44 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1100904 64812 ? Ssl 2025 644:08 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1099872 63468 ? Ssl 2025 641:50 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.7 0.7 11714140 130264 ? Ssl 2025 1434:51 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.4 1102072 65724 ? Ssl 2025 653:09 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11829852 117360 ? Ssl Apr20 255:41 node /home/sasa/dex8/dex8-www/server/index.js sasa 1904154 0.6 0.6 11832144 110508 ? Ssl Apr25 146:23 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.8 0.8 1176408 131636 ? Ssl 2025 2279:50 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.5 11802824 91768 ? Ssl 2025 1660:58 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799176 84100 ? Ssl 2025 1375:14 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.7 0.5 1332492 86772 ? Ssl Feb21 802:41 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3652070 0.3 0.4 1100896 65716 ? Ssl 04:03 3:17 node /home/sasa/dex8/dex8-worker/starter.js www-data 3726961 0.0 0.0 2608 532 ? S 21:09 0:00 sh -c ps -aux | grep node www-data 3726963 0.0 0.0 3304 652 ? S 21:09 0:00 grep node