/*
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 0.4 1305256 72508 ? Ssl 2025 1217:19 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11823668 104812 ? Ssl 2025 1923:25 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1302024 69156 ? Ssl 2025 1233:54 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1298428 67816 ? Ssl 2025 1215:23 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.3 3.1 12280528 522420 ? Ssl 2025 15364:05 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 5.9 3.5 12247472 583940 ? Ssl 2025 21304:56 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 775160 0.3 0.3 1097056 62024 ? Ssl 04:02 0:25 node /home/sasa/dex8/dex8-worker/starter.js www-data 786242 0.0 0.0 2608 596 ? S 06:11 0:00 sh -c ps -aux | grep node www-data 786244 0.0 0.0 3304 720 ? S 06:11 0:00 grep node sasa 1214480 0.3 0.7 22311168 126044 ? Ssl 2025 979:58 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1102592 67280 ? Ssl 2025 885:02 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.4 1101060 66140 ? Ssl 2025 883:31 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1101288 65084 ? Ssl 2025 890:25 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.4 1102084 65672 ? Ssl 2025 885:48 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1100928 66548 ? Ssl 2025 883:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.4 1166952 65528 ? Ssl 2025 873:43 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 64796 ? Ssl 2025 870:05 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.6 0.7 11844700 123528 ? Ssl 2025 1814:37 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.4 1101816 65644 ? Ssl 2025 882:44 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.6 11818556 114644 ? Ssl Apr20 820:05 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.4 0.5 1304116 82748 ? Ssl May31 180:39 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1904154 0.6 0.8 11862340 146608 ? Ssl Apr25 569:31 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.8 0.8 1176540 132720 ? Ssl 2025 2754:08 node /home/sasa/voovuu/voovuu-api/starter.js sasa 3168557 0.6 0.5 11804068 93900 ? Ssl 2025 2073:45 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 84376 ? Ssl 2025 1721:35 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.7 0.5 1332680 86204 ? Ssl Feb21 1294:08 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js