microbenchmark Questions
2
Solved
How do one use the list-argument in the microbenchmark function.
I want to microbenchmark the same function with different inputs as in
microbenchmark(j1 = {sample(1e5)},
j2 = {sample(2e5)},
j3...
Paladin asked 5/10, 2015 at 14:20
1
Solved
Unexpected performance results when comparing dictionary lookup vs multiple is operators in .NET 4.7
I have the problem where I need to do dynamic dispatch based on an object type. The types based on which I need to dispatch are known at compile time - in my example they are 17.
My initial guess ...
Lascivious asked 28/12, 2017 at 12:39
2
Solved
If I run these benchmarks in Rust:
#[bench]
fn bench_rnd(b: &mut Bencher) {
let mut rng = rand::weak_rng();
b.iter(|| rng.gen_range::<f64>(2.0, 100.0));
}
#[bench]
fn bench_ln(b: &...
Mosque asked 11/7, 2017 at 14:33
1
Solved
I was recently playing with some benchmarks and found very interesting results that I can't explain right now. Here is the benchmark:
@BenchmarkMode(Mode.Throughput)
@Fork(1)
@State(Scope.Thread)
...
Fungistat asked 11/6, 2017 at 18:33
1
Solved
I want to profile JMH tests and look at a call tree like in the VisualVM. But when I use the StackProfiler, it gives me native methods like that, which totally useless in my case.
....[Thread stat...
Sweetheart asked 2/6, 2017 at 16:42
1
Solved
I have a microbenchmark that shows very strange results:
@BenchmarkMode(Mode.Throughput)
@Fork(1)
@State(Scope.Thread)
@Warmup(iterations = 10, time = 1, timeUnit = TimeUnit.SECONDS, batchSize = 1...
Irretrievable asked 2/6, 2017 at 17:14
2
I implemented an experimental OOP language and now benchmark garbage collection using a Storage benchmark. Now I want to check/print the following benchmark for small depths (n=2, 3, 4,..).
The tr...
Ombre asked 18/4, 2017 at 6:54
1
I'm working on a maven project. The scenario is something like below...
class Test {
public void applyAll() {
....................
....................
Collection<Migratable> applicable...
Exocrine asked 6/4, 2017 at 9:37
6
Solved
I argued with a friend the other day about those two snippets. Which is faster and why ?
value = 5;
if (condition) {
value = 6;
}
and:
if (condition) {
value = 6;
} else {
value = 5;
}
Wha...
Bremen asked 4/4, 2017 at 8:28
11
Solved
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...
Brack asked 2/2, 2009 at 17:39
1
Solved
I have a benchmark :
@BenchmarkMode(Mode.Throughput)
@Fork(1)
@State(Scope.Thread)
@Warmup(iterations = 10, time = 1, timeUnit = TimeUnit.SECONDS, batchSize = 1000)
@Measurement(iterations = 40, ...
Insurrectionary asked 12/2, 2017 at 22:17
1
Solved
I'm developing a function to plot a zoo object so I'm benchmarking the execution speeds of various options using microbenchmark.
However, each time I run the microbenchmark I get the following err...
Alathia asked 18/1, 2017 at 11:59
2
I have some highly perf sensitive code. A SIMD implementation using SSEn and AVX uses about 30 instructions, while a version that uses a 4096 byte lookup table uses about 8 instructions. In a micro...
Serf asked 8/1, 2017 at 5:53
1
I started from Patterson & Hennessy book with basic definitions and then followed the intel programming reference documents for more information about TLB.
From the intel documents i got to kn...
Braze asked 21/2, 2016 at 23:9
1
Solved
My current setup:
public void launchBenchmark() throws Exception {
Options opt = new OptionsBuilder()
.include(this.getClass().getName())
.mode(Mode.Throughput) //Calculate number of operation...
Monogenetic asked 17/10, 2016 at 8:16
7
Solved
In this code:
if (value >= x && value <= y) {
when value >= x and value <= y are as likely true as false with no particular pattern, would using the & operator be faster ...
Grimbal asked 20/9, 2016 at 7:34
1
Solved
According to the docs, microbenchmark:::autoplot "Uses ggplot2 to produce a more legible graph of microbenchmark timings."
Cool! Let's try the example code:
library("ggplot2")
tm <- microbench...
Chumley asked 27/6, 2014 at 12:12
1
Solved
While I was testing the read performance of a direct java.nio.ByteBuffer I noticed that the absolute read is on average 2x times faster than the relative read. Also if I compare the source code of ...
Denning asked 4/9, 2016 at 18:9
6
Solved
I've heard this term used, but I'm not entirely sure what it means, so:
What DOES it mean and what DOESN'T it mean?
What are some examples of what IS and ISN'T microbenchmarking?
What are the dan...
Rhotacism asked 16/5, 2010 at 5:41
3
Solved
I've recently started learning Go and I'm trying to implement a map that can be used concurrently by multiple groutines. I want to be able to compare my implementation to a simple sync.Mutex-protec...
Volume asked 1/5, 2016 at 12:59
6
Solved
I noticed that using an NSDateFormatter can be quite costly. I figured out that allocating and initializing the object already consumes a lot of time.
Further, it seems that using an NSDateFormatte...
Terms asked 14/12, 2010 at 17:21
1
Solved
I'm trying to understand why it is wise to use Blackhole.consumeCPU()?
Something I found about Blackhole.consumeCPU() on Google
Sometimes when we run run a benchmark across multiple threads we als...
Eternalize asked 29/3, 2016 at 15:23
6
Solved
I'm writing some code in Java where, at some point, the flow of the program is determined by whether two int variables, "a" and "b", are non-zero (note: a and b are never negati...
Gothicize asked 21/2, 2016 at 1:51
2
Solved
Intuitively, the latter should be faster than the former. However, I was very surprised when I saw benchmark results:
require 'benchmark/ips'
b = (0..20).to_a;
y = 21;
Benchmark.ips do |x|
x...
Dees asked 10/12, 2015 at 16:53
1
Solved
I do not see the rationale why python's timeit module measures the time using the best of 3. Here is an example from my console:
~ python -m timeit 'sum(range(10000))'
10000 loops, best of 3: 119 ...
Barcus asked 28/12, 2015 at 19:46
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