Firebug is known to make Gmail slow unless it is configured correctly

November 12, 2007 § 2 Comments

For the best Gmail performance, Gmail suggests disabling Firebug for http://www.google.com.

Windows or Linux Users

To disable Firebug:

  1. Click the green or red icon in the bottom right corner of the browser window to open Firebug.
  2. Click the bug icon in the top left corner of Firebug and select ‘Disable Firebug for mail.google.com.’

If you’d like to keep Firebug running, you may improve Gmail performance by following these steps:

  1. Click the green or red icon in the bottom right corner of the browser window to open Firebug.
  2. Click the Console tab.
  3. Select Options.
  4. Uncheck Show XMLHttpRequests.
  5. Click the Net tab.
  6. Select Options.
  7. Check Disable Network Monitoring.

Mac Users

To disable Firebug:

  1. Click the green or red icon in the bottom right corner of the browser window to open Firebug.
  2. Click the bug icon in the top left corner of Firebug and select ‘Disable Firebug for mail.google.com.’

If disabling Firebug for Gmail doesn’t improve performance results, you may have to entirely disable Firebug.

Source: mail.google.com/support

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40 Tips for Optimizing Your PHP Code

November 11, 2007 § 7 Comments

  1. If a method can be static, declare it static. Speed improvement is by a factor of 4.
  2. echo is faster than print.
  3. Use echo’s multiple parameters instead of string concatenation.
  4. Set the maxvalue for your for-loops before and not in the loop.
  5. Unset your variables to free memory, especially large arrays.
  6. Avoid magic like __get, __set, __autoload
  7. require_once() is expensive
  8. Use full paths in includes and requires, less time spent on resolving the OS paths.
  9. If you need to find out the time when the script started executing, $_SERVER[’REQUEST_TIME’] is preferred to time()
  10. See if you can use strncasecmp, strpbrk and stripos instead of regex
  11. str_replace is faster than preg_replace, but strtr is faster than str_replace by a factor of 4
  12. If the function, such as string replacement function, accepts both arrays and single characters as arguments, and if your argument list is not too long, consider writing a few redundant replacement statements, passing one character at a time, instead of one line of code that accepts arrays as search and replace arguments.
  13. It’s better to use select statements than multi if, else if, statements.
  14. Error suppression with @ is very slow.
  15. Turn on apache’s mod_deflate
  16. Close your database connections when you’re done with them
  17. $row[’id’] is 7 times faster than $row[id]
  18. Error messages are expensive
  19. Do not use functions inside of for loop, such as for ($x=0; $x < count($array); $x) The count() function gets called each time.
  20. Incrementing a local variable in a method is the fastest. Nearly the same as calling a local variable in a function.

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