2904
77%

Ran 23 Dec 2018 01:32PM UTC

Jobs 16

Files 390

Run time 55min

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Committed 23 Dec 2018 01:17PM UTC coverage: 76.854% (+0.02%) from 76.837%

Build # 2904

Build Type

push

travis-ci

Committed by

web-flow

Commit Message

optimize: Refactor gradient convergence and remove DefaultSettings (#772)

* optimize: Refactor gradient convergence and remove DefaultSettings

The current API design makes it easy to make a mistake in not using the DefaultSettings. This change makes the zero value of Settings do the 'right thing'. The remaining setting that is used by the DefaultSettings is to change the behavior of the GradientTolerance. This was necessary because gradient-based Local methods (BFGS, LBFGS, CG, etc.) typically _define_ convergence by the value of the gradient, while Global methods (CMAES, GuessAndCheck) are defined by _not_ converging when the gradient is small. The problem is to have two completely different default behaviors without knowing the Method. The solution is to treat a very small value of the gradient as a method-based convergence, in the same way that a small spread of data is a convergence of CMAES. Thus, the default behavior, from the perspective of Settings, is never to converge based on the gradient, but all of the Local methods will converge when a value close to the minimum is found. This default value is set to a very small value, such that users should not want a smaller value. A user can thus still set a (more reasonable) convergence value through settings.

Fixes 677.

Coverage Stats

45490 of 59190 relevant lines covered (76.85%)

14.09 hits per line

Jobs

ID	Job ID	Ran	Coverage
1	2904.1 (TAGS="")	23 Dec 2018 01:33PM UTC	76.59	Travis Job 2904.1
2	2904.2 (TAGS="-tags bounds")	23 Dec 2018 01:35PM UTC	76.61	Travis Job 2904.2
3	2904.3 (TAGS="-tags noasm")	23 Dec 2018 01:37PM UTC	76.78	Travis Job 2904.3
4	2904.4 (TAGS="-tags appengine")	23 Dec 2018 01:37PM UTC	76.77	Travis Job 2904.4
5	2904.5 (TAGS="")	23 Dec 2018 01:32PM UTC	76.59	Travis Job 2904.5
6	2904.6 (TAGS="-tags bounds")	23 Dec 2018 01:49PM UTC	76.61	Travis Job 2904.6
7	2904.7 (TAGS="-tags noasm")	23 Dec 2018 01:50PM UTC	76.77	Travis Job 2904.7
8	2904.8 (TAGS="-tags appengine")	23 Dec 2018 01:52PM UTC	76.76	Travis Job 2904.8
9	2904.9 (TAGS="")	23 Dec 2018 01:52PM UTC	76.59	Travis Job 2904.9
10	2904.10 (TAGS="-tags bounds")	23 Dec 2018 01:54PM UTC	76.6	Travis Job 2904.10
11	2904.11 (TAGS="-tags noasm")	23 Dec 2018 02:07PM UTC	76.76	Travis Job 2904.11
12	2904.12 (TAGS="-tags appengine")	23 Dec 2018 02:08PM UTC	76.76	Travis Job 2904.12
13	2904.13 (TAGS="")	23 Dec 2018 02:10PM UTC	76.58	Travis Job 2904.13
14	2904.14 (TAGS="-tags bounds")	23 Dec 2018 02:12PM UTC	76.6	Travis Job 2904.14
15	2904.15 (TAGS="-tags noasm")	23 Dec 2018 02:13PM UTC	76.76	Travis Job 2904.15
16	2904.16 (TAGS="-tags appengine")	23 Dec 2018 02:27PM UTC	76.76	Travis Job 2904.16

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