Test JS script file

Selected file: fs-sync.js
Compare console.log() outputs in browser and NodeJS.
Notice: Open browser's console in FireBUG!

  1. 05define_functions.js
  2. 10module_basic1.js
  3. 10module_basic2.js
  4. 10module_basic3.js
  5. 11module_nesting.js
  6. file.js
  7. fs-async.js
  8. fs-async2.js
  9. fs-async3.js
  10. fs-sync.js
  11. fs-sync2.js
  12. http.js
  13. index.html
  14. index.js
  15. my_modules
  16. net.js
  17. npm-debug.log
  18. package.json
  19. promises
  20. socket.js
  21. sys.js
  22. testfiles

..:: Source code - fs-sync.js ::..

/*
This example shows synchronous execution, blocking code.
console.log(contents); blocks process and that's why
console.log('Do something else!'); must wait

Max file that didn't crash nodeJS had 350MB
 */

//load modules
var fs = require('fs');

//synchronous file reading
var content = fs.readFileSync('./testfiles/largefile350mb.txt', 'utf8');
console.log(content);

//here process is blocked while file is not read completely. After that next console.log(); continue

console.log('Do something else!');

/*
Conclusion: Due to asynchronous execution, first is file dumped then appear 'Do something else'.
That's because console.log('Do something else!'); waits fs.readFileSync('largefile350mb.txt', 'utf8'); to be finished.
 */
 

..:: NodeJS Console - fs-sync.js ::..

$ node fs-sync.js 

		
		


		
		
$ps -aux | grep node (list all node processes)
sasa        1194  0.5  0.5 1305620 85612 ?       Ssl   2025 1080:10 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1305000 73060 ?       Ssl   2025 775:46 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.7  0.6 11830648 112288 ?     Ssl   2025 1711:55 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.5  0.6 11819196 106948 ?     Ssl   2025 1227:29 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304920 73952 ?       Ssl   2025 787:24 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1301872 72376 ?       Ssl   2025 774:19 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  2.8 12151676 458784 ?     Ssl   2025 9724:36 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  3.3  2.0 12020592 342016 ?     Ssl   2025 7111:33 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.4  0.7 22311424 125980 ?     Ssl   2025 486:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101056 65800 ?       Ssl   2025 414:25 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.3 1100804 65448 ?       Ssl   2025 413:22 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1100776 64752 ?       Ssl   2025 416:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100548 65328 ?       Ssl   2025 414:19 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100672 65536 ?       Ssl   2025 413:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.4 1102696 66076 ?       Ssl   2025 407:18 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.4 1102688 66260 ?       Ssl   2025 405:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11708808 124320 ?     Ssl   2025 860:12 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100792 64904 ?       Ssl   2025 412:48 node /home/sasa/dex8/dex8-worker/starter.js
sasa     2295794  0.3  0.3 1098844 63592 ?       Ssl  03:02   2:34 node /home/sasa/dex8/dex8-worker/starter.js
www-data 2366184  0.0  0.0   2608   600 ?        S    16:26   0:00 sh -c ps -aux | grep node
www-data 2366186  0.0  0.0   3304   716 ?        S    16:26   0:00 grep node
sasa     2509059  0.5  0.5 11802444 94052 ?      Ssl  Feb14 304:52 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.7 1175640 130144 ?      Ssl   2025 1731:27 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11820432 96264 ?      Ssl   2025 1237:47 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 84720 ?      Ssl   2025 1014:08 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1330104 83056 ?       Ssl  Feb21 267:33 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js