Plotty
plotty is a quick hack to do performance comparisions on the command line. It sweeps the x value and runs commands to compute the y value. The y value is extracted from the stdout of the command using a regular expression. The graphs are drawn using gnuplot which you'll need to have installed.
Motivation
I wanted to compare puma and falcon at different levels of concurrency using wrk. It was possible to do it by hand but hard see the trend. In addition, I wanted a tool with visual output so that I could use it as part of a presentation about concurrency. So, I made this tool to quickly compare and graph the data generated by running commands. Because wrk generates a lot of different statistics, and I was interested in several of them, the tool uses a regular expression to extract the data to be graphed using a regular expression.
Web Server Comparison
wrk -c $x -t $x -d 1 http://localhost:9292 *******
wrk -c $x -t $x -d 1 http://localhost:9293 #######
800 +--------------------------------------------------------------------+
| + + + + + |
700 |-+ ################################ +-|
| #### |
600 |-+ ### +-|
| #### |
| ## |
500 |-+ ## +-|
| ## |
400 |-+ # +-|
| ## |
300 |-+ # +-|
| # |
200 |-+ # +-|
| # |
| ##******************************************************* |
100 |-# +-|
|# + + + + + |
0 +--------------------------------------------------------------------+
0 50 100 150 200 250 300
Installation
Add this line to your application's Gemfile:
gem 'plotty'And then execute:
$ bundleOr install it yourself as:
$ gem install plottyUsage
plotty allows you to graph data from commands, e.g.
$ plotty -x 1:10 -y '\d+' -- 'echo 1' 'echo $x' 'expr $x \* $x'This will graph the results of executing the 3 commands after the split (--) with $x = 1, 2, 3, ... 10. The y value is computed by the first match of the given regular expression (in this case \d+).
X Axis
The -x argument can take sequences of the following format:
| Value | Meaning |
|---|---|
1:10 |
Enumerate from 1 to 10. |
1:2:10 |
Enumerate from 1 to 10 with steps of size 2. |
1:*2:64 |
Enumerate from 1 to 64 by multiplying the value by 2 each time. |
Y Axis
The -y argument is a regular expression which is used to extract the y value from the stdout of the command. If a capture is specified, the first one is used.
Use libcaca
Add the following to your ~/.gnuplot
set terminal caca driver ncurses
If you are on arch, install gnuplot-caca.
Examples
Trivial Math
plotty -x 1:1:20 -y '\d+' -e "set terminal dumb; set key outside" -- 'echo 1' 'echo $x'
20 +------------------------------------------------------+
| + + + + + + + + +### | echo 1 *******
18 |-+ ## +-| echo $x #######
| ### |
16 |-+ ### +-|
| ### |
14 |-+ ## +-|
| ### |
12 |-+ ### +-|
| ### |
10 |-+ ## +-|
| ### |
8 |-+ ### +-|
| ### |
6 |-+ ## +-|
| ### |
4 |-+ ### +-|
| ### |
2 |-+ ## +-|
| ##**************************************************|
0 +------------------------------------------------------+
0 2 4 6 8 10 12 14 16 18 20
plotty -x 1:1:100 -y '\d+' -e "set terminal dumb; set key outside" -- 'echo $x' 'expr $x \* $x'
100 +-----------------------------------------------+
| + + + + + + + + #| echo $x *******
90 |-+ ##-| expr $x \* $x #######
| # |
80 |-+ ## +-|
| ## |
70 |-+ ## +-|
| # |
60 |-+ ## +-|
| ## |
50 |-+ # +-|
| ## |
40 |-+ ## +-|
| ## |
30 |-+ ### +-|
| ### |
20 |-+ ## +-|
| #### |
10 |-+ ###### *************|
| #####*************************** + + |
0 +-----------------------------------------------+
1 2 3 4 5 6 7 8 9 10
Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request
License
Released under the MIT license.
Copyright, 2018, by Samuel G. D. Williams.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.