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ezgliding / goigc
86%
master: 68%

Build:
Build:
LAST BUILD BRANCH: binder
DEFAULT BRANCH: master
Repo Added 07 Aug 2017 01:16PM UTC
Files 11
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pending completion
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travis-ci

rochaporto
Improve Task.Distance by not allocating new slices

pprof analysis showed the following results:

     0.95s  2.13%  3.01%     30.22s 67.86%
github.com/ezgliding/goigc.(*Task).Distance
     2.54s  5.70%  8.71%     16.31s 36.63%  runtime.growslice
     3.56s  7.99% 16.71%     15.55s 34.92%  runtime.mallocgc
     0.48s  1.08% 17.79%     11.55s 25.94%
github.com/ezgliding/goigc.(*Point).Distance

which shows a big issue with slice allocation between the Task.Distance
and Point.Distance calls. Looking at the code, probably for easy of use,
we were creating a new slice on *every* Distance calculation.

Use the Points already in the task instead. Here's the result:

benchcmp old.txt new.txt
benchmark                                                   old ns/op
new ns/op       delta
BenchmarkBruteForceOptimize/optimize-short-flight-1/1-4     42654178724
21424710602     -49.77%

4 of 4 new or added lines in 1 file covered. (100.0%)

378 of 438 relevant lines covered (86.3%)

1991015.31 hits per line

Relevant lines Covered
Build:
Build:
438 RELEVANT LINES 378 COVERED LINES
1991015.31 HITS PER LINE
Source Files on pprof
  • List 0
  • Changed 0
  • Source Changed 0
  • Coverage Changed 0
Coverage ∆ File Lines Relevant Covered Missed Hits/Line

Recent builds

Builds Branch Commit Type Ran Committer Via Coverage
57 pprof Improve Task.Distance by not allocating new slices pprof analysis showed the following results: 0.95s 2.13% 3.01% 30.22s 67.86% github.com/ezgliding/goigc.(*Task).Distance 2.54s 5.70% 8.71% 16.31s 36.63% runtime.growslice ... push 10 Aug 2017 09:10PM UTC rochaporto travis-ci pending completion  
55 pprof Improve Task.Distance by not allocating new slices pprof analysis showed the following results: 0.95s 2.13% 3.01% 30.22s 67.86% github.com/ezgliding/goigc.(*Task).Distance 2.54s 5.70% 8.71% 16.31s 36.63% runtime.growslice ... push 10 Aug 2017 09:06PM UTC rochaporto travis-ci pending completion  
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