benchmarking | 易学教程

What advice can you give me for writing a meaningful benchmark?

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问题 I have developed a framework that is used by several teams in our organisation. Those "modules", developed on top of this framework, can behave quite differently but they are all pretty resources consuming even though some are more than others. They all receive data in input, analyse and/or transform it, and send it further. We planned to buy new hardware and my boss asked me to define and implement a benchmark based on the modules in order to compare the different offers we have got. My idea

Performance Benchmark CouchDB x Relational Databases

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问题 Does anyone knows a link for a good performance benchmark of CouchDB x "Any relational Database" 回答1: Not a performance benchmark, but also significantly more "real world". http://johnpwood.net/2009/08/18/couchdb-the-last-mile/ 回答2: Someone tried... http://jayant7k.blogspot.com/2009/08/document-oriented-data-stores.html 来源： https://stackoverflow.com/questions/1296741/performance-benchmark-couchdb-x-relational-databases

Fortran's performance

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问题 Fortran's performances on Computer Language Benchmark Game are surprisingly bad. Today's result puts Fortran 14th and 11th on the two quad-core tests, 7th and 10th on the single cores. Now, I know benchmarks are never perfect, but still, Fortran was (is?) often considered THE language for high performance computing and it seems like the type of problems used in this benchmark should be to Fortran's advantage. In an recent article on computational physics, Landau (2008) wrote: However, [Java]

How can I benchmark code that mutates the setup data?

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问题 The current implementation of the built-in benchmarking tool appears to run the code inside the iter call multiple times for each time the setup code outside the iter is run. When the code being benchmarked modifies the setup data, subsequent iterations of the benchmarked code are no longer benchmarking the same thing. As a concrete example, I am benchmarking how fast it takes to remove values from a Vec : #![feature(test)] extern crate test; use test::Bencher; #[bench] fn clearing_a_vector(b

cpu_get_usage in php?

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问题 I have created a benchmark class that allows the user to insert for example $timer->checkpoint('1'); to check out some code for time,memory consumption and such.... and at the end of the code if she/he wants to test it she/he has to insert $result=$timer->result(); this gives out some data to public function result() like e.g. memory usage (using memory_get_peak_usage) and time consumption (microtime()). This all works just fine for me. But how can I use the combination of existing built-in

Insert random data in MySql and PHP for benchmark

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I was wondering if there is a (free) tool for mysql/php benchmark. In particular, I would like to insert thousands of data into the MySQL database, and test the application with concurrent queries to see if it will last. This is, test the application in the worst cases. I saw some pay tools, but none free or customizable one. Any suggestion? or any script? Thnx Insert one record into the table. Then do: INSERT IGNORE INTO table SELECT FLOOR(RAND()*100000) FROM table; Then run that line several times. Each time you will double the number of rows in the table (and doubling grows VERY fast). This

Why does Method access seem faster than Field access?

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问题 I was doing some tests to find out what the speed differences are between using getters/setters and direct field access. I wrote a simple benchmark application like this: public class FieldTest { private int value = 0; public void setValue(int value) { this.value = value; } public int getValue() { return this.value; } public static void doTest(int num) { FieldTest f = new FieldTest(); // test direct field access long start1 = System.nanoTime(); for (int i = 0; i < num; i++) { f.value = f

shade for parameter resource: Cannot find 'resource' in class org.apache.maven.plugins.shade.resource.ManifestResourceTransformer

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问题 I'm working on a maven project. I'm trying to integrate jmh benchmarking into my project. The pom.xml of my maven project... <parent> <groupId>platform</groupId> <artifactId>platform-root</artifactId> <version>3.0-SNAPSHOT</version> <relativePath>../../pom.xml</relativePath> </parent> <artifactId>platform-migration</artifactId> <packaging>jar</packaging> <name>Platform Migration</name> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compile.source>1.7<

How do i write a benchmark script in Go to measure ops/sec

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I am practicing my Golang by writing a simple Redis clone. How do i write a benchmark script that would establish X connections per second at C concurrency level to deal with my server's protocol and measure how many ops/sec? I can simply write a script that would actually do this: for i := range(1000) { // Open connection // Perform command // Close connection } But i want to know the concept behind distributing the number of connections per concurrency level per second. This is best handled by the built-in testing.Benchmark system. For example, a test case like: func BenchmarkHello(b

Python timing in order to trigger specific events

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In Python I would like to run a function calling a default action for 20 seconds. However, there are 5 specific timings within these 20 seconds when another function should be triggered. In order to simplify my code, I have replaced the "action" functions with simple printing commands. Here is what I have so far - The output seems ok, in that it lasts for 10 seconds and prints the time and the default state/action. But the triggered action is missing! Is there a better/correct way to do this? import random import time import numpy as np import itertools def uniform_min_range(a, b, n, min_dist)