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        1208  0.3  0.4 1304744 72108 ?       Ssl   2025 1190:29 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11822420 104964 ?     Ssl   2025 1880:52 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1302792 69408 ?       Ssl   2025 1206:56 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298172 67236 ?       Ssl   2025 1188:38 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.3  2.9 12262564 488992 ?     Ssl   2025 15112:05 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  5.8  3.5 12248496 586864 ?     Ssl   2025 20271:00 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa       55678  0.3  0.3 1097564 62368 ?       Ssl  04:02   0:33 node /home/sasa/dex8/dex8-worker/starter.js
www-data   67790  0.0  0.0   2608   532 ?        S    06:48   0:00 sh -c ps -aux | grep node
www-data   67792  0.0  0.0   3304   720 ?        S    06:48   0:00 grep node
sasa     1214480  0.3  0.7 22311168 125644 ?     Ssl   2025 950:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101312 66176 ?       Ssl   2025 856:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1101316 65672 ?       Ssl   2025 854:57 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1101544 65344 ?       Ssl   2025 861:36 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1101316 64976 ?       Ssl   2025 857:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1100672 66124 ?       Ssl   2025 854:30 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166184 64932 ?       Ssl   2025 845:06 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 64752 ?       Ssl   2025 841:41 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.6  0.7 11844444 125896 ?     Ssl   2025 1767:25 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.4 1103096 66756 ?       Ssl   2025 854:10 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.7 11832784 120312 ?     Ssl  Apr20 753:21 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.4 1303404 80636 ?       Ssl  May31 143:08 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.8 11861060 144644 ?     Ssl  Apr25 515:32 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1183196 131432 ?      Ssl   2025 2695:43 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11836888 112836 ?     Ssl   2025 2017:19 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799488 84304 ?      Ssl   2025 1678:10 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332424 86416 ?       Ssl  Feb21 1235:12 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js