Each column has a description of what it means if you set your mouse to hover over it in Firebug. I’ll assume you can read up on how each column works on your own then. However, you have definitely come across some odd behavior which needs to be explained. The own time is the amount … Read more
Strings are problematic Basically in Java, String references ( things that use char[] behind the scenes ) will dominate most business applications memory wise. How they are created determines how much memory they consume in the JVM. Just because they are so fundamental to most business applications as a data type, and they are one … Read more
Strings are problematic Basically in Java, String references ( things that use char[] behind the scenes ) will dominate most business applications memory wise. How they are created determines how much memory they consume in the JVM. Just because they are so fundamental to most business applications as a data type, and they are one … Read more
You could try cachegrind and it’s front-end kcachegrind.
Identical literal strings are not guaranty to be identical, but you can build type from it which can compare identical (without comparing string), something like: // Sequence of char template <char…Cs> struct char_sequence { template <char C> using push_back = char_sequence<Cs…, C>; }; // Remove all chars from char_sequence from ‘\0’ template <typename, char…> struct … Read more
Please see yappi (Yet Another Python Profiler).
Regarding memory consumption Memory leaks in JavaScript are usually ignored except when they turn into browser memory leaks (that is, even after the user navigates away from the page, the memory continues allocated and there’s no way to free it). The reason for this is that while your web application may have some memory leaks, … Read more
session_start (with sessions stored in files) is blocking in PHP, so this issue will appear if you try to start several server sessions for the same browser session (AJAX or multiple browser tabs/windows). Each session_start will wait until the other sessions have been closed. See here: http://konrness.com/php5/how-to-prevent-blocking-php-requests/ Try changing from files to database storage of … Read more
A function call requires that the current execution frame is suspended, and a new frame is created and pushed on the stack. This is relatively expensive, compared to many other operations. You can measure the exact time required with the timeit module: >>> import timeit >>> def f(): pass … >>> timeit.timeit(f) 0.15175890922546387 That’s 1/6th … Read more
Pympler is a Python memory profiler that is compatible with both Python 2.x and Python3.x.