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 1305252 84592 ?       Ssl   2025 801:33 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1303976 72692 ?       Ssl   2025 570:46 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.8  0.7 11828276 118656 ?     Ssl   2025 1282:07 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.6  0.6 11817080 107912 ?     Ssl   2025 902:38 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.8  0.5 1331116 84756 ?       Ssl   2025 1241:57 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.4 1305176 73204 ?       Ssl   2025 580:10 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1297836 67816 ?       Ssl   2025 569:55 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.4  3.2 12231080 539596 ?     Ssl   2025 6653:43 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  2.9  1.5 11946144 255804 ?     Ssl   2025 4439:27 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.4  0.7 22311424 126500 ?     Ssl   2025 257:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101312 65808 ?       Ssl   2025 195:35 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101572 66456 ?       Ssl   2025 195:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1101032 65700 ?       Ssl   2025 196:27 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.4 1101316 65848 ?       Ssl   2025 195:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1101184 65696 ?       Ssl   2025 195:00 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100136 63592 ?       Ssl   2025 192:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1099616 62952 ?       Ssl   2025 191:23 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.8  0.7 11709064 124064 ?     Ssl   2025 498:28 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100536 64636 ?       Ssl   2025 194:13 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1455096  0.3  0.4 1102172 67060 ?       Ssl  03:03   1:44 node /home/sasa/dex8/dex8-worker/starter.js
www-data 1495527  0.0  0.0   2608   596 ?        S    11:47   0:00 sh -c ps -aux | grep node
www-data 1495529  0.0  0.0   3304   712 ?        S    11:47   0:00 grep node
sasa     2628167  0.9  0.8 1182396 134548 ?      Ssl   2025 1229:54 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.5 11821032 96608 ?      Ssl   2025 874:56 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11798920 84368 ?      Ssl   2025 684:35 node /home/sasa/@mikosoft/dodo-examples/server/index.js