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  0.4  0.5 1304576 83944 ?       Ssl   2025 1389:49 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1208  0.3  0.4 1304744 73160 ?       Ssl   2025 987:40 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1236  0.5  0.6 11818448 107164 ?     Ssl   2025 1561:11 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1257  0.3  0.4 1304664 73200 ?       Ssl   2025 1001:45 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.3  0.4 1298416 68340 ?       Ssl   2025 986:19 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1363  4.5  3.1 12210544 521492 ?     Rsl   2025 12826:01 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1886  4.3  3.0 12157916 493320 ?     Ssl   2025 12300:34 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
sasa     1214480  0.3  0.7 22311168 125372 ?     Ssl   2025 724:11 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214483  0.3  0.4 1101056 65548 ?       Ssl   2025 640:50 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214536  0.3  0.4 1100804 65528 ?       Ssl   2025 639:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214544  0.3  0.3 1101032 65252 ?       Ssl   2025 644:05 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214588  0.3  0.3 1100548 64264 ?       Ssl   2025 640:52 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214617  0.3  0.3 1100672 65108 ?       Ssl   2025 639:07 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214641  0.3  0.3 1100392 63964 ?       Ssl   2025 629:44 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1214671  0.3  0.3 1100128 63788 ?       Ssl   2025 627:28 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1215731  0.7  0.7 11713628 130416 ?     Ssl   2025 1410:32 node /home/sasa/dex8/dex8-api/starter.js
sasa     1216489  0.3  0.3 1100792 64868 ?       Ssl   2025 638:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa     1399960  0.8  0.7 11821916 116220 ?     Ssl  Apr20 224:16 node /home/sasa/dex8/dex8-www/server/index.js
sasa     1904154  0.6  0.9 11858752 152892 ?     Ssl  Apr25 121:51 node /home/sasa/miko/miko-hr/server/index.js
sasa     2628167  0.8  0.8 1176152 131456 ?      Ssl   2025 2245:20 node /home/sasa/voovuu/voovuu-api/starter.js
sasa     3168557  0.6  0.6 11825088 100912 ?     Ssl   2025 1635:04 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa     3169051  0.5  0.5 11799176 83868 ?      Ssl   2025 1353:10 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa     3264954  0.7  0.5 1332492 85800 ?       Ssl  Feb21 770:55 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa     3318307  0.3  0.3 1099612 64328 ?       Ssl  04:03   3:03 node /home/sasa/dex8/dex8-worker/starter.js
www-data 3388609  0.0  0.0   2608   596 ?        S    19:42   0:00 sh -c ps -aux | grep node
www-data 3388611  0.0  0.0   3304   716 ?        S    19:42   0:00 grep node