Try the Django Debug Toolbar. It will show you what queries are executed on each page and how much time they take. It’s a really useful, powerful and easy to use tool. Also, read recommendations about Django performance in Database access optimization from the documentation. And Django performance tips by Jacob Kaplan-Moss.
A friend and I have written a Python profile viewer called SnakeViz that runs in a web browser. If you are already successfully using RunSnakeRun SnakeViz may not add that much value, but SnakeViz is much easier to install. Edit: SnakeViz supports Python 2 and 3 and works on all major systems.
Here is the modified function: as recommended by the community, feel free to amend this its a community wiki. static double Profile(string description, int iterations, Action func) { //Run at highest priority to minimize fluctuations caused by other processes/threads Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.High; Thread.CurrentThread.Priority = ThreadPriority.Highest; // warm up func(); var watch = new Stopwatch(); // … Read more
Do you want to do this without changing the code that you want to measure timings for? If you don’t mind changing the code, then you could do something like this: def time[R](block: => R): R = { val t0 = System.nanoTime() val result = block // call-by-name val t1 = System.nanoTime() println(“Elapsed time: ” … Read more
Make sure you are not keeping global references to data. That prevents the python garbage collector from releasing the memory. Don’t use mod_python. It loads an interpreter inside apache. If you need to use apache, use mod_wsgi instead. It is not tricky to switch. It is very easy. mod_wsgi is way easier to configure for … Read more
If you want to measure CPU time, can use time.process_time() for Python 3.3 and above: import time start = time.process_time() # your code here print(time.process_time() – start) First call turns the timer on, and second call tells you how many seconds have elapsed. There is also a function time.clock(), but it is deprecated since Python … Read more
If you have GNU date (or another version that can output nanoseconds), do this at the beginning of /etc/bash.bashrc (or wherever you’d like to begin a trace in any Bash script): PS4=’+ $(date “+%s.%N”)\011 ‘ exec 3>&2 2>/tmp/bashstart.$$.log set -x add set +x exec 2>&3 3>&- at the end of ~/.bashrc (or at the end … Read more
I’ve been working with OO MATLAB for a while, and ended up looking at similar performance issues. The short answer is: yes, MATLAB’s OOP is kind of slow. There is substantial method call overhead, higher than mainstream OO languages, and there’s not much you can do about it. Part of the reason may be that … Read more
First: Time sampling profilers are more robust than CPU sampling profilers. I’m not extremely familiar with Windows development tools so I can’t say which ones are which. Most profilers are CPU sampling. A CPU sampling profiler grabs a stack trace every N instructions. This technique will reveal portions of your code that are CPU bound. … Read more
use the arguments -Xms<memory> -Xmx<memory>. Use M or G after the numbers for indicating Megs and Gigs of bytes respectively. -Xms indicates the minimum and -Xmx the maximum.