309
95%

Ran 21 Feb 2018 09:54PM UTC

Jobs 2

Files 8

Run time 55s

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Build # 309

Build Type

push

travis-ci

Committed by

KristofferC

Commit Message

Use a more performant formula for haversine (#90)

* Use a more performant formula for haversine

```julia
using BenchmarkTools
Main> using BenchmarkTools

Main> a = rand()
0.8809105663628993

Main> @benchmark asin(sqrt($a))
BenchmarkTools.Trial:
  memory estimate:  0 bytes
  allocs estimate:  0
  --------------
  minimum time:     15.790 ns (0.00% GC)
  median time:      16.579 ns (0.00% GC)
  mean time:        17.691 ns (0.00% GC)
  maximum time:     712.929 ns (0.00% GC)
  --------------
  samples:          10000
  evals/sample:     1000

Main> @benchmark atan2(sqrt($a), sqrt(1-$a))
BenchmarkTools.Trial:
  memory estimate:  0 bytes
  allocs estimate:  0
  --------------
  minimum time:     24.080 ns (0.00% GC)
  median time:      24.870 ns (0.00% GC)
  mean time:        25.987 ns (0.00% GC)
  maximum time:     417.257 ns (0.00% GC)
  --------------
  samples:          10000
  evals/sample:     1000
Main> asin(sqrt(a)) ≈ atan2(sqrt(a), sqrt(1-a))
true
```

* Take minimum after square root in haversine

Run Details

531 of 550 relevant lines covered (96.55%)

1710.12 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	309.1	21 Feb 2018 09:54PM UTC	0	96.55	Travis Job 309.1
2	309.2	21 Feb 2018 09:55PM UTC	0	96.55	Travis Job 309.2

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