I am trying to optimize one part of my code that inserts data into MySQL. Should I chain INSERTs to make one huge multiple-row INSERT or are multiple separate INSERTs faster? 13 Answers 13
It’s widely mentioned that Redis is “Blazing Fast” and mongoDB is fast too. But, I’m having trouble finding actual numbers comparing the results of the two. Given similar configurations, features and operations (and maybe showing how the factor changes with different configurations and operations), etc, is Redis 10x faster?, 2x faster?, 5x faster? I’m ONLY … Read more
To do some load testing, for my own curiosity, on my server I ran: ab -kc 50 -t 200 http://localhost/index.php This opens up 50 keep-alive connections for 200 seconds and just slams my server with requests for index.php In my results, I get: Concurrency Level: 50 Time taken for tests: 200.007 seconds Complete requests: 33106 … Read more
Can someone please walk me through the process of how I can load test my website using apache bench tool (ab)? I want to know the following: How many people per minute can the site handle? Please walk me through the commands I should run to figure this out. I tried every tutorial, and they … Read more
I have a C program that aims to be run in parallel on several processors. I need to be able to record the execution time (which could be anywhere from 1 second to several minutes). I have searched for answers, but they all seem to suggest using the clock() function, which then involves calculating the … Read more
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 months ago. Improve this question I’m currently using GCC, but I discovered Clang recently and I’m pondering switching. There is … Read more
Or is it now the other way around? From what I’ve heard there are some areas in which C# proves to be faster than C++, but I’ve never had the guts to test it by myself. Thought any of you could explain these differences in detail or point me to the right place for information … Read more
The following Java program takes on average between 0.50 secs and 0.55 secs to run: public static void main(String[] args) { long startTime = System.nanoTime(); int n = 0; for (int i = 0; i < 1000000000; i++) { n += 2 * (i * i); } System.out.println((double) (System.nanoTime() – startTime) / 1000000000 + ” … Read more
def main(): for i in xrange(10**8): pass main() This piece of code in Python runs in (Note: The timing is done with the time function in BASH in Linux.) real 0m1.841s user 0m1.828s sys 0m0.012s However, if the for loop isn’t placed within a function, for i in xrange(10**8): pass then it runs for a … Read more
How do you write (and run) a correct micro-benchmark in Java? I’m looking for some code samples and comments illustrating various things to think about. Example: Should the benchmark measure time/iteration or iterations/time, and why? Related: Is stopwatch benchmarking acceptable? 1Best Answer 11 Tips about writing micro benchmarks from the creators of Java HotSpot: Rule … Read more
