microbenchmark Questions
3
Solved
I was learning multi threading and found slow down of Object.hashCode in multi threaded environment as it is taking over twice as long to compute the default hash code running 4 threads vs 1 thread...
Ouabain asked 16/12, 2015 at 13:47
3
Consider the following program:
#define _FILE_OFFSET_BITS 64 // Allow large files.
#define REVISION "POSIX Revision #9"
#include <iostream>
#include <cstdio>
#include <ctime>
c...
Intinction asked 21/10, 2015 at 9:18
1
Solved
I'm playing around with JMH ( http://openjdk.java.net/projects/code-tools/jmh/ ) and I just stumbled on a strange result.
I'm benchmarking ways to make a shallow copy of an array and I can observe...
Lucie asked 29/9, 2015 at 2:45
3
Solved
I am getting to know some of the microbenchmark R package's featrues. I implemented a sample code from this publication of Hadley Wickham and received an error I cannot find any precise information...
Riggall asked 29/12, 2013 at 16:24
1
Solved
Everyone who tries to utilize JMH framework to create some meaningful tests will come across JMH sample tests
(http://hg.openjdk.java.net/code-tools/jmh/file/tip/jmh-samples/src/main/java/org/openj...
Presidentship asked 31/7, 2015 at 16:48
2
Solved
I'm curious if for..in should be preferred to .each for performance reasons.
Haug asked 5/6, 2015 at 8:38
2
Solved
is there any way to transform output of function microbenchmark::microbenchmark into the data frame or matrix?
For example
v <- rnorm(100)
m <- microbenchmark(mean(v), sum(v))
The output
...
Enalda asked 28/3, 2015 at 23:26
1
I would like to understand the difference between R's microbenchmark and system.time() ? How do they internally measure function execution time ?
Skidmore asked 18/2, 2015 at 3:55
2
I'm comparing 2 ways to filter lists, with and without using streams. It turns out that the method without using streams is faster for a list of 10,000 items. I'm interested in understanding why is...
Extrusive asked 6/2, 2015 at 0:53
2
I was wondering how much faster a!=0 is than !a==0 and used the R package microbenchmark.
Here's the code (reduce 3e6 and 100 if your pc is slow):
library("microbenchmark")
a <- sample(0:1, siz...
Pram asked 8/12, 2014 at 11:45
1
Solved
JMH seems like it does most caliper features as well or better than caliper, but I couldn't figure out how to measure allocation rate, which is in general useful to be able to look at in a microben...
Inandin asked 2/12, 2014 at 23:2
1
Solved
I've decided to measure incrementation with different locking strategies and using JMH for this purpose.
I'm using JMH for checking throughput and average time as well as simple custom test for che...
Marrymars asked 18/11, 2014 at 13:45
2
I am running some micro benchmarks on Java list iteration code. I have used -XX:+PrintCompilation, and -verbose:gc flags to ensure that nothing is happening in the background when the timing is bei...
Exophthalmos asked 26/10, 2012 at 12:11
1
Solved
I was playing around with binary serialization and deserialization in Rust and noticed that binary deserialization is several orders of magnitude slower than with Java. To eliminate the possibility...
Evanevander asked 12/8, 2014 at 3:33
1
Solved
In a Java REST service performance test, I got an unexpected pattern: a method that creates and returns always the same value object in each invocation runs faster than another version that j...
Abdullah asked 25/7, 2014 at 16:58
1
Solved
I am using http://openjdk.java.net/projects/code-tools/jmh/ for benchmarking and i get a result like:
Benchmark Mode Samples Score Score error Units
o.a.f.c.j.b.TestClass.test1 avgt 5 2372870,600...
Gurkha asked 13/7, 2014 at 14:8
4
Solved
I use JMH to specify the complexity of the operation. If you've never worked with JMH, don't worry. JMH will just launch the estimateOperation method multiple times and then get the average time.
...
Adventist asked 15/6, 2014 at 20:15
1
Solved
I have tried to use jmh together with sbt, but so far I have not managed to set it up properly so that .scala based benchmarks work.
As the combination sbt + .java based benchmarks works, I tried...
Weese asked 11/4, 2014 at 15:27
4
Solved
I came across this old question and did the following experiment with scala 2.10.3.
I rewrote the Scala version to use explicit tail recursion:
import scala.annotation.tailrec
object ScalaMain {...
Melan asked 22/3, 2014 at 17:38
3
Solved
Can anyone help me make this R code more efficient?
I'm trying to write a function that changes a list of strings to a vector of strings, or a
list of numbers to a vector of numbers, of lists of t...
Pincer asked 19/3, 2014 at 18:35
1
Solved
While analyzing the results of a recent question here, I encountered a quite peculiar phenomenon: apparently an extra layer of HotSpot's JIT-optimization actually slows down execution on my machine...
Neurasthenia asked 12/2, 2014 at 20:17
3
Solved
I wrote a simple benchmark in order to find out if bounds check can be eliminated when the array gets computed via bitwise and. This is basically what nearly all hash tables do: They compute
h &...
Willtrude asked 11/2, 2014 at 13:17
1
Solved
While investigating the subtler consequences of generational garbage collectors on application performance, I have hit a quite staggering discrepancy in the performance of a very basic operation &n...
Raquelraquela asked 3/2, 2014 at 9:44
1
Solved
In reference to this question, the answer specify that the unsorted array takes more time because it fails the branch prediction test. but if we make a minor change in the program:
import java.uti...
Suffice asked 29/1, 2014 at 13:23
1
Solved
I use jmh(http://openjdk.java.net/projects/code-tools/jmh/ ) to benchmark some method. Also I have the set of parameters that I want to use as arguments to run this method.
Is it possible to genera...
Seaver asked 5/10, 2013 at 17:48
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