JMH offers the fork functionality for a few reasons. One is compilation profile separation as discussed by Rafael above. But this behaviour is not controlled by the @Forks annotation (unless you choose 0 forks, which means no subprocesses are forked to run benchmarks at all). You can choose to run all the benchmarks as part … Read more
It is about as accurate as you can get for a simple benchmark. But there are some factors not under your control: load on the system from other processes state of the heap before/during the benchmark You could do something about that last point, a benchmark is one of the rare situations where calling GC.Collect … Read more
Introduction The debate on whether bsxfun is better than repmat or vice versa has been going on like forever. In this post, we would try to compare how the different built-ins that ship with MATLAB fight it out against repmat equivalents in terms of their runtime performances and hopefully draw some meaningful conclusions out of … Read more
I don’t have exact numbers on the efficiency of the JVM vs the CLR, but the difference, if any, is likely to be small. However, on the language side, C# does have some more low level constructs than Java, which would allow for more optimization. Constructs such as: User defined value types. Fast to allocate, … Read more
time.time() * 1000 will give you millisecond accuracy if possible.
If you look at your times http has bigger waiting time and smaller receiving time. https on the other hand has smaller waiting time and bigger receiving time. I would interpret this as the http port on the shared hosting server is more busy, thus a request stays longer in the queue until is accepted … Read more
A benchmark is something that measures the time for some whole operation. e.g. I/O operations per second under some workload. So the result is typically a single number, in either seconds or operations per second. Or a data set with results for different parameters, so you can graph it. You might use a benchmark to … Read more
tl;dr -> Provide a proper MVCE. This answer should be a comment but is too big to be posted as comment, so posting as answer instead: I had to fix a bunch of syntax errors (missing semicolons) and declare undefined variables. After fixing all those problems, the code did NOTHING (the program quit even prior … Read more
As Louis Wasserman said, ImmutableMap is not optimized for objects with slow equals method. I think the main difference is here: HashMap: if (e.hash == hash && ((k = e.key) == key || key.equals(k))) return e.value; ImmtubleMap: if (key.equals(candidateKey)) { return entry.getValue(); As you can see, to check for collisions, HashMap first check the hashes. … Read more