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-.. _cherrypyspeed:
-
-*********************
-How fast is CherryPy?
-*********************
-
-Introduction
-============
-
-When people ask this question, they usually mean "how fast will my CherryPy-based application be?".
-
-In 99% of the cases, the answer is "this depends on your actual application code, not on CherryPy itself".
-
-The reason is that, for 99% of the real-world dynamic applications, most of the time spent to return a page will be spent in your actual application code, and the time actually spent in the CherryPy code will be negligible.
-
-For instance, a typical page that requires a few database calls to be built might take in total 200ms to be served. Out of these 200ms, about 2ms will be spent by CherryPy itself, and 198ms will be spend in your actual database calls and page rendering...
-
-So you can see that, if you want to optimize anything, you should really optimize your actual application code before you try to optimize CherryPy.
-
-
-Raw speed of the CherryPy HTTP server
-=====================================
-
-Despite the real-life most common scenario explained in the introduction, some people still want to know the raw speed of the CherryPy HTTP server.
-
-About the benchmark
--------------------
-
-This benchmarking only makes sense on very small documents, otherwise we're no longer measuring the raw speed of the HTTP server, but also the speed of the application.
-
-.. warning::
-
- This benchmark uses the ``ab`` tool from the Apache project, it's far from being a perfect tool nor does it provide a realistic user workflow. Take these results lightly and always perform real load/performance tests in your environment with better tools.
-
-This benchmarking was performed on a laptop in the following environment:
- * Processor: Intel® Core™ i3-2330M CPU @ 2.20GHz × 4
- * RAM: 4GB
- * Ubuntu 13.10
- * Python 2.7
- * CherryPy 3.2.4
- * Load testing tool: ab from Apache2
-
-We used the following basic CherryPy app:
-
-.. code-block:: python
-
- import cherrypy
-
- class Root(object):
- def index(self):
- return "OK"
- index.exposed = True
-
- if __name__ == "__main__":
- # remove the default CherryPy enabled tools
- # to really check the speed of the request processing stack
- cherrypy.config.clear()
-
- # we don't need the logging for this test
- cherrypy.config.update({'log.screen': False})
-
- cherrypy.quickstart(Root())
-
-For the raw WSGI server tests, we used the following code:
-
-.. code-block:: python
-
- from cherrypy import wsgiserver
-
- def my_crazy_app(environ, start_response):
- start_response('200 OK', [('Content-type','text/plain')])
- return ['OK']
-
- if __name__ == '__main__':
- server = wsgiserver.CherryPyWSGIServer(
- ('0.0.0.0', 8080), my_crazy_app)
- server.stats['Enabled'] = False
- try:
- server.start()
- except KeyboardInterrupt:
- server.stop()
-
-
-Test 1: Dynamic content / no concurrent connections
----------------------------------------------------
-
-.. code-block:: text
-
- $ ab -n 1000 http://localhost:8080/
- This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
- Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
- Licensed to The Apache Software Foundation, http://www.apache.org/
-
- Benchmarking localhost (be patient)
- Completed 100 requests
- Completed 200 requests
- Completed 300 requests
- Completed 400 requests
- Completed 500 requests
- Completed 600 requests
- Completed 700 requests
- Completed 800 requests
- Completed 900 requests
- Completed 1000 requests
- Finished 1000 requests
-
-
- Server Software: CherryPy/3.2.4
- Server Hostname: localhost
- Server Port: 8080
-
- Document Path: /
- Document Length: 2 bytes
-
- Concurrency Level: 1
- Time taken for tests: 2.414 seconds
- Complete requests: 1000
- Failed requests: 0
- Write errors: 0
- Total transferred: 126000 bytes
- HTML transferred: 2000 bytes
- Requests per second: 414.19 [#/sec] (mean)
- Time per request: 2.414 [ms] (mean)
- Time per request: 2.414 [ms] (mean, across all concurrent requests)
- Transfer rate: 50.96 [Kbytes/sec] received
-
- Connection Times (ms)
- min mean[+/-sd] median max
- Connect: 0 0 0.0 0 1
- Processing: 1 2 0.6 2 8
- Waiting: 1 2 0.5 2 5
- Total: 1 2 0.6 2 8
-
- Percentage of the requests served within a certain time (ms)
- 50% 2
- 66% 2
- 75% 2
- 80% 2
- 90% 3
- 95% 3
- 98% 4
- 99% 5
- 100% 8 (longest request)
-
-
-Test 2: Dynamic content / concurrent connections / persistent connections
--------------------------------------------------------------------------
-
-.. code-block:: text
-
- $ ab -k -n 1000 http://localhost:8080/
- This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
- Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
- Licensed to The Apache Software Foundation, http://www.apache.org/
-
- Benchmarking localhost (be patient)
- Completed 100 requests
- Completed 200 requests
- Completed 300 requests
- Completed 400 requests
- Completed 500 requests
- Completed 600 requests
- Completed 700 requests
- Completed 800 requests
- Completed 900 requests
- Completed 1000 requests
- Finished 1000 requests
-
-
- Server Software: CherryPy/3.2.4
- Server Hostname: localhost
- Server Port: 8080
-
- Document Path: /
- Document Length: 2 bytes
-
- Concurrency Level: 1
- Time taken for tests: 0.626 seconds
- Complete requests: 1000
- Failed requests: 0
- Write errors: 0
- Keep-Alive requests: 1000
- Total transferred: 150000 bytes
- HTML transferred: 2000 bytes
- Requests per second: 1597.89 [#/sec] (mean)
- Time per request: 0.626 [ms] (mean)
- Time per request: 0.626 [ms] (mean, across all concurrent requests)
- Transfer rate: 234.07 [Kbytes/sec] received
-
- Connection Times (ms)
- min mean[+/-sd] median max
- Connect: 0 0 0.0 0 0
- Processing: 1 1 0.2 1 3
- Waiting: 1 1 0.2 1 3
- Total: 1 1 0.2 1 3
-
- Percentage of the requests served within a certain time (ms)
- 50% 1
- 66% 1
- 75% 1
- 80% 1
- 90% 1
- 95% 1
- 98% 1
- 99% 2
- 100% 3 (longest request)
-
-Test 3: Dynamic content / concurrent connections
-------------------------------------------------
-
-Now let's alo tell "ab" to simulate 10 concurrent users.
-
-.. code-block:: text
-
- $ ab -c 10 -n 1000 http://localhost:8080/
- This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
- Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
- Licensed to The Apache Software Foundation, http://www.apache.org/
-
- Benchmarking localhost (be patient)
- Completed 100 requests
- Completed 200 requests
- Completed 300 requests
- Completed 400 requests
- Completed 500 requests
- Completed 600 requests
- Completed 700 requests
- Completed 800 requests
- Completed 900 requests
- Completed 1000 requests
- Finished 1000 requests
-
-
- Server Software: CherryPy/3.2.4
- Server Hostname: localhost
- Server Port: 8080
-
- Document Path: /
- Document Length: 2 bytes
-
- Concurrency Level: 10
- Time taken for tests: 2.653 seconds
- Complete requests: 1000
- Failed requests: 0
- Write errors: 0
- Total transferred: 126000 bytes
- HTML transferred: 2000 bytes
- Requests per second: 376.99 [#/sec] (mean)
- Time per request: 26.526 [ms] (mean)
- Time per request: 2.653 [ms] (mean, across all concurrent requests)
- Transfer rate: 46.39 [Kbytes/sec] received
-
- Connection Times (ms)
- min mean[+/-sd] median max
- Connect: 0 2 44.7 0 1000
- Processing: 5 21 33.7 17 406
- Waiting: 4 20 33.7 16 406
- Total: 5 23 55.9 17 1020
-
- Percentage of the requests served within a certain time (ms)
- 50% 17
- 66% 19
- 75% 20
- 80% 21
- 90% 23
- 95% 25
- 98% 31
- 99% 286
- 100% 1020 (longest request)
-
-
-Test 4: Dynamic content / concurrent connections / persistent connections
--------------------------------------------------------------------------
-
-In this use case, we tell ab to reuse connections as per HTTP/1.1.
-
-.. code-block:: text
-
- $ ab -k -c 10 -n 1000 http://localhost:8080/
- This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
- Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
- Licensed to The Apache Software Foundation, http://www.apache.org/
-
- Benchmarking localhost (be patient)
- Completed 100 requests
- Completed 200 requests
- Completed 300 requests
- Completed 400 requests
- Completed 500 requests
- Completed 600 requests
- Completed 700 requests
- Completed 800 requests
- Completed 900 requests
- Completed 1000 requests
- Finished 1000 requests
-
-
- Server Software: CherryPy/3.2.4
- Server Hostname: localhost
- Server Port: 8080
-
- Document Path: /
- Document Length: 2 bytes
-
- Concurrency Level: 10
- Time taken for tests: 1.944 seconds
- Complete requests: 1000
- Failed requests: 0
- Write errors: 0
- Keep-Alive requests: 1000
- Total transferred: 150000 bytes
- HTML transferred: 2000 bytes
- Requests per second: 514.36 [#/sec] (mean)
- Time per request: 19.442 [ms] (mean)
- Time per request: 1.944 [ms] (mean, across all concurrent requests)
- Transfer rate: 75.35 [Kbytes/sec] received
-
- Connection Times (ms)
- min mean[+/-sd] median max
- Connect: 0 1 31.6 0 1000
- Processing: 1 18 16.6 16 424
- Waiting: 1 14 15.6 12 418
- Total: 1 19 36.3 16 1040
-
- Percentage of the requests served within a certain time (ms)
- 50% 16
- 66% 21
- 75% 24
- 80% 26
- 90% 32
- 95% 38
- 98% 47
- 99% 51
- 100% 1040 (longest request)
-
-
-Test 5: Raw WSGI server / no concurrent connections
----------------------------------------------------
-
-.. code-block:: text
-
- $ ab -n 1000 http://localhost:8080/
- This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
- Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
- Licensed to The Apache Software Foundation, http://www.apache.org/
-
- Benchmarking localhost (be patient)
- Completed 100 requests
- Completed 200 requests
- Completed 300 requests
- Completed 400 requests
- Completed 500 requests
- Completed 600 requests
- Completed 700 requests
- Completed 800 requests
- Completed 900 requests
- Completed 1000 requests
- Finished 1000 requests
-
-
- Server Software: sylvain-laptop
- Server Hostname: localhost
- Server Port: 8080
-
- Document Path: /
- Document Length: 2 bytes
-
- Concurrency Level: 1
- Time taken for tests: 1.041 seconds
- Complete requests: 1000
- Failed requests: 0
- Write errors: 0
- Total transferred: 108000 bytes
- HTML transferred: 2000 bytes
- Requests per second: 960.58 [#/sec] (mean)
- Time per request: 1.041 [ms] (mean)
- Time per request: 1.041 [ms] (mean, across all concurrent requests)
- Transfer rate: 101.31 [Kbytes/sec] received
-
- Connection Times (ms)
- min mean[+/-sd] median max
- Connect: 0 0 0.0 0 0
- Processing: 0 1 0.3 1 4
- Waiting: 0 1 0.3 1 4
- Total: 0 1 0.3 1 4
-
- Percentage of the requests served within a certain time (ms)
- 50% 1
- 66% 1
- 75% 1
- 80% 1
- 90% 1
- 95% 1
- 98% 2
- 99% 2
- 100% 4 (longest request)
-
-
-Test 6: Raw WSGI server / concurrent connections
-------------------------------------------------
-
-.. code-block:: text
-
- $ ab -c 10 -n 1000 http://localhost:8080/
- This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
- Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
- Licensed to The Apache Software Foundation, http://www.apache.org/
-
- Benchmarking localhost (be patient)
- Completed 100 requests
- Completed 200 requests
- Completed 300 requests
- Completed 400 requests
- Completed 500 requests
- Completed 600 requests
- Completed 700 requests
- Completed 800 requests
- Completed 900 requests
- Completed 1000 requests
- Finished 1000 requests
-
-
- Server Software: sylvain-laptop
- Server Hostname: localhost
- Server Port: 8080
-
- Document Path: /
- Document Length: 2 bytes
-
- Concurrency Level: 10
- Time taken for tests: 1.235 seconds
- Complete requests: 1000
- Failed requests: 0
- Write errors: 0
- Total transferred: 108000 bytes
- HTML transferred: 2000 bytes
- Requests per second: 809.88 [#/sec] (mean)
- Time per request: 12.348 [ms] (mean)
- Time per request: 1.235 [ms] (mean, across all concurrent requests)
- Transfer rate: 85.42 [Kbytes/sec] received
-
- Connection Times (ms)
- min mean[+/-sd] median max
- Connect: 0 1 31.5 0 996
- Processing: 2 8 19.4 7 341
- Waiting: 1 8 19.4 6 341
- Total: 2 9 37.0 7 1003
-
- Percentage of the requests served within a certain time (ms)
- 50% 7
- 66% 7
- 75% 8
- 80% 8
- 90% 10
- 95% 11
- 98% 15
- 99% 17
- 100% 1003 (longest request)
-
-
-Test 7: Raw WSGI server / concurrent connections / persistent connections
--------------------------------------------------------------------------
-
-.. code-block:: text
-
- $ ab -k -c 10 -n 1000 http://localhost:8080/
- This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
- Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
- Licensed to The Apache Software Foundation, http://www.apache.org/
-
- Benchmarking localhost (be patient)
- Completed 100 requests
- Completed 200 requests
- Completed 300 requests
- Completed 400 requests
- Completed 500 requests
- Completed 600 requests
- Completed 700 requests
- Completed 800 requests
- Completed 900 requests
- Completed 1000 requests
- Finished 1000 requests
-
-
- Server Software: sylvain-laptop
- Server Hostname: localhost
- Server Port: 8080
-
- Document Path: /
- Document Length: 2 bytes
-
- Concurrency Level: 10
- Time taken for tests: 0.992 seconds
- Complete requests: 1000
- Failed requests: 0
- Write errors: 0
- Keep-Alive requests: 0
- Total transferred: 108000 bytes
- HTML transferred: 2000 bytes
- Requests per second: 1008.08 [#/sec] (mean)
- Time per request: 9.920 [ms] (mean)
- Time per request: 0.992 [ms] (mean, across all concurrent requests)
- Transfer rate: 106.32 [Kbytes/sec] received
-
- Connection Times (ms)
- min mean[+/-sd] median max
- Connect: 0 0 0.1 0 1
- Processing: 1 7 22.8 6 345
- Waiting: 0 7 22.7 5 344
- Total: 1 7 22.8 6 345
-
- Percentage of the requests served within a certain time (ms)
- 50% 6
- 66% 7
- 75% 7
- 80% 7
- 90% 9
- 95% 10
- 98% 11
- 99% 13
- 100% 345 (longest request)