Quicksort + Profiling
Hello! i'm trying to profile a quicksort code. the code is as follows: qsort [] = [] qsort (x:xs) = qsort (filter (< x) xs) ++ [x] ++ qsort (filter (>= x) xs) please help me out! ...
profiling
Profiling python C extensions
I have developed a python C-extension that receives data from python and compute some cpu intensive calculations. It's possible to profile the C-extension? The problem here is that writing a sample test in C to be profiled would be challenging because the code rely on particular inputs and data structures (generated by python control co...
Accidental Complexity in OpenSSL HMAC functions
SSL Documentation Analaysis This question is pertaining the usage of the HMAC routines in OpenSSL. Since Openssl documentation is a tad on the weak side in certain areas, profiling has revealed that using the: unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len, const unsigned char *d, int n, ...
What's a very easy C++ profiler (VC++)?
I've used a few profilers in the past and never found them particularly easy. Maybe I picked bad ones, maybe I didn't really know what I was expecting! But I'd like to know if there are any 'standard' profilers which simply drop in and work? I don't believe I need massively fine-detailed reports, just to pick up major black-spots. Ease o...
C++ Profiling: KiFastSystemCallRet
I searched for this after seeing it's the top rated item when profiling using Very Sleepy, and it seems everyone gets the answer "it's a system function, ignore it". But Sleepy's hint for the function says: Hint: KiFastSystemCallRet often means the thread was waiting for something else to finish. Possible causes might be d...
find out the number of threads created by a short running program
I have program that runs fast enough. I want to see the number of threads created by the program. ldd test shows use of library pthread. but how to find out number of threads created by the program. I only have command line access to the PC on which the program is run. The platform is linux. ...
"blkclr (mach_kernel)" shows up in mac's shark profiler. What does it do?
I am profiling a C program using Mac's Shark which shows that some of CPU time goes to "blkclr" in "mach_kernel". What does this kernel function do? I speculate it is related to memory allocation, but I am not sure. I have googled for some time, but could not find the answer, either. Does someone know this? Thanks in advance. ...
Is there any way to profile the performance of views in ASP.NET MVC?
Hi, I am profiling my MVC app and the speed from the Performance Explorer is around 500 ms (50 ms code, 450ms SQL roundtrips that won't exist in deployment). However, the time taken waiting on a response to a GET request is around 1200ms. I've managed to discover through trial and error that this is due to a particularly slow partial ...
Profiling short-lived Java applications
Is there any Java profiler that allows profiling short-lived applications? The profilers I found so far seem to work with applications that keep running until user termination. However, I want to profile applications that work like command-line utilities, it runs and exits immediately. Tools like visualvm or NetBeans Profiler do not even...
Where is the code generated for sqrt and __CIsqrt?
I set VC++ to generate ASM for a method which calls sqrt, to see if it's generating FPU or SSE instructions. However when sqrt is called, I don't see the ASM. I only see a call to some function __CIsqrt, which I assume is some system sqrt function. I can't see any ASM for that to know what it is doing? ...
Profiling and Graphics.updateDisplay0()
I am profiling my BlackBerry application (a game) with the options 'In method only' and 'Time including native method'. Under the 'All methods' node (after a decent run of the game) the single most time consuming function is Graphics.updateDisplay0() with over 50% of the run time spent there. I don't quite know what is the purpose of th...
Using MS Standalone profiler in VS2008 Professional
I am trying to profile my .NET dll while running it from VS unit testing tools but I am having problems. I am using the standalone command-line profiler as VS2008 Professional does not come with an inbuilt profiler. I have an open CMD window and have run the following commands (I instrumented it earlier which is why vsinstr gave the war...
Diagnosing the .NET Legacy
Assume you are taking over a legacy .NET app. [pre - 3.0] written in C# What are the top 5 diagnostic measures, profiling or otherwise that you would employ to assess the health of the application? I am not just looking at the "WHAT" part of diagnosis but also at the "HOW". For e.g. It is indeed necessary to assess fast/optimum respons...
Firebug profiling issue: "no activity to profile"
I want to try some different options with some javascript (jQuery) to see which is the fastest, however I can't get profiling working properly. Here is the code I want to test. $this.keypress(function(e) { console.profile("test"); //retrieve the charcode if possible, otherwise get the keycode k = e.which ? e...
PL/SQL profiler missing data
We are using pl/sql profiler to collect metrics. We noticed that on one of the environment the plsql_profiler_runs table is populated with the total execution time but the finer details that gets collected in the table plsql_profiler_data is missing. Any idea why this would be happening? We do use dbms_profiler.flush_data() before stopp...
.NET allocations profiling
I need a way to track all allocations in a .NET application that happen during a single step in the process of debugging my application. I mean, when I'm in the debugger, stepping through code, I would like to see for a single step what allocation took place. Is there a tool or a way to do it? I tried several memory profilers including C...
Javascript fine grain performance tweaking
I have been writing my first jQuery plugin and struggling to find a means to time how long different pieces of code take to run. I can use firebug and console.time/profile. However, it seems that because my code executes so fast I get no results with profile and with time it spits out 0ms. (http://stackoverflow.com/questions/2690697/fir...
Dottrace Dead vs. Garbage
After reading the dottrace documentation I realized that: Dead objects are objects deleted before the end point of the snapshot. Garbage objects are objects allocated after the starting point and deleted before the end point - in other words, "Garbage objects" is a subset of "Dead objects". But after doing some profiling sessions, I ...
How can I profile a subroutine without using modules?
I'm tempted to relabel this question 'Look at this brick. What type of house does it belong to?' Here's the situation: I've effectively been asked to profile some subroutines having access to neither profilers (even Devel::DProf) nor Time::HiRes. The purpose of this exercise is to 'locate' bottlenecks. At the moment, I'm sprinkling pri...
VS 2010 Profiling Problem with Signed Assemblies
I have a website that uses AjaxControlToolkit.dll and Log4Net.dll; When I try to run the performance profiling tool in VS 2010 on it it gives me the following warnings "AjaxControlToolkit.dll is signed and instrumenting it will invalidate its signature. If you proceed without a post-instrument event to re-sign the binary it may not load ...