performance - Interpreting ruby's benchmark results: difference between Benchmark.bm and Benchmark.bmbm -


i testing 4 different algorithms in ruby , i"m having trouble interpreting results returned ruby's benchmark utility.

i ran each set of algorithms twice, once using benchmark.bm , again using benchmark.bmbm. here results:

benchmark.bm:

  real   stime  total   utime 1 214.91  3.44  154.93 151.48 2 208.85  3.03  161.37 158.34 3 224.40  3.23  161.63 158.41 4 234.02  3.34  163.49 160.16

benchmark.bmbm: 

   real   stime  total  utime 1 252.61  3.50  163.89 160.39 2 278.56  3.65  164.61 160.96 3 241.89  3.37  162.73 159.36 4 256.12  3.56  163.91 160.35

which algorithm performs best(1,2,3 or 4) according these results? practical differences between using benchmark.bm , benchmark.bmbm.

apologies if answered elsewhere, couldn't find direct answer.

there don't seem significant differences between algorithms. what's relevant number 'total', total time spent cpu on running code. these pretty close each other.

the difference between benchmark.bm , benchmark.bmbm latter runs benchmark, throws away result, runs again , returns second run's results. reason avoid unfair disadvantage of subjects: possible there exist common resources between subjects 1 of them needs initialize, , bmbm have better chance in 'warm' state , obtain fair result.


Comments

Post a Comment

Popular posts from this blog

get url and add instance to a model with prefilled foreign key :django admin -

Image
i have page in each contest shown in row. each row contains contest id , link other model names have foreign key contest. news model: class news(models.model): title = models.charfield(max_length=50, null=true) description = models.textfield() time = models.timefield( default= datetime.datetime.now().time()) contest = models.foreignkey(contest) i want use admin adding , changing these models. want when user clicks on 'news' has foreign key contest id=1, shows list of news value foreign key. use {% instance in instances %} <tr class="{% cycle 'row1' 'row2' %}"> <td>{{ instance.title }}</td> <td>{{ instance.starttime }}</td> <td>{{ instance.timespan }}</td> <td>{{ instance.date }}</td> <td><a href="/adm...
Read more

android - Keyboard hides my half of edit-text and button below it even in scroll view -

i having trouble keyboard covers edit-text , half of button in scroll view. here's layout , please tell me how should resolve problem. many questions on topic none of them s working me. <?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:background="@drawable/bg" android:layout_height="match_parent"> <scrollview android:layout_width="match_parent" android:fillviewport="true" android:layout_height="match_parent"> <relativelayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <linearlayout android:layout_width="match_parent" android:layout_height="w...
Read more

css - Make div keyboard-scrollable in jQuery Mobile? -

from can tell, although jquery-mobile-powered pages can contain divs overflow set scroll or auto, , these divs can scrolled one-screen bar or mouse wheel, cannot scrolled using arrow keys, page-up/page-down, or home/end. instead, official "page" div (with data-role="page") absorbs input. perhaps other divs can't acquire focus, i'm not sure. is there way around this? edit: jsfiddle of simple example: https://jsfiddle.net/qogz0shx/ <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"> </script> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"/> <style> #outer { overflow:scroll; height: 50vh; width: 50vw; } #inner { height: 500vh; width: 500vw; } ...
Read more