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 1310176 75108 ?       Ssl   2025 1390:54 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11825540 103296 ?     Ssl   2025 2196:33 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1307748 74756 ?       Ssl   2025 1408:18 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1301520 70416 ?       Ssl   2025 1387:30 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.2  4.1 12408204 681960 ?     Ssl   2025 17504:32 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  6.8  3.6 12264132 598772 ?     Rsl   2025 28245:14 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa      766360  0.3  0.5 22291940 97024 ?      Ssl  Aug06   7:29 node /home/sasa/dex8/dex8-worker/starter.js
www-data  957430  0.0  0.0   2608   600 ?        S    19:01   0:00 sh -c ps -aux | grep node
www-data  957432  0.0  0.0   3304   712 ?        S    19:01   0:00 grep node
sasa     1214480  0.3  0.7 22311168 124752 ?     Ssl   2025 1171:54 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1102848 66884 ?       Ssl   2025 1068:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.3 1100804 65492 ?       Ssl   2025 1067:03 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.4 1102312 66424 ?       Ssl   2025 1075:34 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1102084 65412 ?       Ssl   2025 1069:56 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.4 1102208 66312 ?       Ssl   2025 1066:24 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1166952 65404 ?       Ssl   2025 1057:38 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 64064 ?       Ssl   2025 1052:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.8  0.7 11846844 123752 ?     Ssl   2025 2715:52 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1101560 64672 ?       Ssl   2025 1066:26 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.6 11819288 110216 ?     Ssl  Apr20 1349:25 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1631573  0.4  0.6 1323156 102820 ?      Ssl  May31 486:55 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa     1904154  0.6  0.9 11856852 158460 ?     Ssl  Apr25 1023:40 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.7  0.7 1176028 130632 ?      Ssl   2025 3158:06 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11833528 109180 ?     Ssl   2025 2440:35 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799488 83724 ?      Ssl   2025 2000:01 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.6  0.5 1333960 87344 ?       Ssl  Feb21 1677:32 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js