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using and running the profiler and stats analyser
Code testing, patterns, profiles and optimisation. example from a Well House Consultants training course
More on Code testing, patterns, profiles and optimisation. [link]
Source code: profdemo.py Module: Y212
import cProfile import pstats # import transport.railway as railway import railway cProfile.run("railway.test_code()","profile.out") result = pstats.Stats("profile.out") result.sort_stats("ncalls") result.print_stats() result.print_callees() """ Sample Output WomanWithCat:q2 grahamellis$ python profdemo.py ('DKT', 'Dorking West 55774 0.000519955534837') ('WKK', 'Wakefield Kirkgate 488289 0.000761843908013') ('TNS', 'Thorne South 129736 0.00215052105815') ('DCW', 'Dorchester West 130838 0.00230055488467') ('BSJ', 'Bedford St.Johns 154976 0.00303272764815') ('MDB', 'Maidstone Barracks 267765 0.00552350008403') ('FNN', 'Farnborough North 618300 0.00594533398027') [snip] ('TNN', 'Thorne North 146856 1.92815411015') ('RLG', 'Rayleigh 978788 1.94469384586') ('NVH', 'Newhaven Harbour 44212 2.3426219126') ('WFL', 'Wainfleet 42548 2.52209269531') ('NCT', 'Newark Castle 237509 2.73520161341') ('BWG', 'Bowling 33948 3.34870979145') ('GTN', 'Grangetown (South Glamorgan) 169950 3.53648131803') 2068 Sat Oct 29 16:35:38 2016 profile.out 104107 function calls in 0.085 seconds Ordered by: call count ncalls tottime percall cumtime percall filename:lineno(function) 42294 0.014 0.000 0.014 0.000 /Users/grahamellis/autumn2016/q2/railway.py:19(getGrowth) 20113 0.004 0.000 0.004 0.000 {cmp} 20113 0.018 0.000 0.034 0.000 /Users/grahamellis/autumn2016/q2/railway.py:52(<lambda>) 2537 0.001 0.000 0.001 0.000 {method 'strip' of 'str' objects} 2537 0.005 0.000 0.005 0.000 {method 'split' of 'str' objects} 2474 0.000 0.000 0.000 0.000 /Users/grahamellis/autumn2016/q2/railway.py:9(getTLC) 2474 0.003 0.000 0.003 0.000 /Users/grahamellis/autumn2016/q2/railway.py:16(getPassengers) 2474 0.001 0.000 0.005 0.000 /Users/grahamellis/autumn2016/q2/railway.py:11(getWanted) 2474 0.001 0.000 0.004 0.000 /Users/grahamellis/autumn2016/q2/railway.py:50(<lambda>) 2474 0.003 0.000 0.003 0.000 /Users/grahamellis/autumn2016/q2/railway.py:5(__init__) 2068 0.000 0.000 0.000 0.000 {method 'append' of 'list' objects} 2068 0.007 0.000 0.007 0.000 /Users/grahamellis/autumn2016/q2/railway.py:37(__repr__) 1 0.017 0.017 0.083 0.083 /Users/grahamellis/autumn2016/q2/railway.py:46(test_code) 1 0.000 0.000 0.000 0.000 {open} 1 0.006 0.006 0.015 0.015 /Users/grahamellis/autumn2016/q2/railway.py:26(factory) 1 0.004 0.004 0.039 0.039 {method 'sort' of 'list' objects} 1 0.000 0.000 0.000 0.000 {method 'keys' of 'dict' objects} 1 0.002 0.002 0.085 0.085 <string>:1(<module>) 1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Profiler' objects} Ordered by: call count Function called... ncalls tottime cumtime /Users/grahamellis/autumn2016/q2/railway.py:19(getGrowth) -> {cmp} -> /Users/grahamellis/autumn2016/q2/railway.py:52(<lambda>) -> 40226 0.013 0.013 /Users/grahamellis/autumn2016/q2/railway.py:19(getGrowth) 20113 0.004 0.004 {cmp} {method 'strip' of 'str' objects} -> {method 'split' of 'str' objects} -> /Users/grahamellis/autumn2016/q2/railway.py:9(getTLC) -> /Users/grahamellis/autumn2016/q2/railway.py:16(getPassengers) -> /Users/grahamellis/autumn2016/q2/railway.py:11(getWanted) -> 2474 0.001 0.004 /Users/grahamellis/autumn2016/q2/railway.py:50(<lambda>) /Users/grahamellis/autumn2016/q2/railway.py:50(<lambda>) -> 2474 0.003 0.003 /Users/grahamellis/autumn2016/q2/railway.py:16(getPassengers) /Users/grahamellis/autumn2016/q2/railway.py:5(__init__) -> {method 'append' of 'list' objects} -> /Users/grahamellis/autumn2016/q2/railway.py:37(__repr__) -> 2068 0.001 0.001 /Users/grahamellis/autumn2016/q2/railway.py:19(getGrowth) /Users/grahamellis/autumn2016/q2/railway.py:46(test_code) -> 2474 0.001 0.005 /Users/grahamellis/autumn2016/q2/railway.py:11(getWanted) 1 0.006 0.015 /Users/grahamellis/autumn2016/q2/railway.py:26(factory) 2068 0.000 0.000 {method 'append' of 'list' objects} 1 0.000 0.000 {method 'keys' of 'dict' objects} 1 0.004 0.039 {method 'sort' of 'list' objects} {open} -> /Users/grahamellis/autumn2016/q2/railway.py:26(factory) -> 2474 0.003 0.003 /Users/grahamellis/autumn2016/q2/railway.py:5(__init__) 2474 0.000 0.000 /Users/grahamellis/autumn2016/q2/railway.py:9(getTLC) 2537 0.005 0.005 {method 'split' of 'str' objects} 2537 0.001 0.001 {method 'strip' of 'str' objects} 1 0.000 0.000 {open} {method 'sort' of 'list' objects} -> 20113 0.018 0.034 /Users/grahamellis/autumn2016/q2/railway.py:52(<lambda>) {method 'keys' of 'dict' objects} -> <string>:1(<module>) -> 1 0.017 0.083 /Users/grahamellis/autumn2016/q2/railway.py:46(test_code) {method 'disable' of '_lsprof.Profiler' objects} -> WomanWithCat:q2 grahamellis$ """ Learn about this subject
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