Misc kernel changes #4182
Merged
Misc kernel changes #4182
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
fingolfin
added
topic: kernel
release notes: not needed
wilfwilson
approved these changes
Nov 20, 2020
Avoid conversion of sets which are not plists. Some timings from an artificial
micro benchmark; before this patch:
gap> for i in [1..1000000] do IS_EQUAL_SET([1..100], [1..100]); od; time;
2598
gap> x:=[1..100];; for i in [1..1000000] do IS_EQUAL_SET(x, x); od; time;
2487
gap> x:=[1..100];; y:=[1..100];; for i in [1..1000000] do IS_EQUAL_SET(x, y); od; time;
2469
gap> x:=[1..100];; y:=[1..100]+1-1;; for i in [1..1000000] do IS_EQUAL_SET(x, y); od; time;
1303
gap> x:=[1..100]+1-1;; y:=[1..100]+1-1;; for i in [1..1000000] do IS_EQUAL_SET(x, y); od; time;
98
After this patch:
gap> for i in [1..1000000] do IS_EQUAL_SET([1..100], [1..100]); od; time;
83
gap> x:=[1..100];; for i in [1..1000000] do IS_EQUAL_SET(x, x); od; time;
29
gap> x:=[1..100];; y:=[1..100];; for i in [1..1000000] do IS_EQUAL_SET(x, y); od; time;
33
gap> x:=[1..100];; y:=[1..100]+1-1;; for i in [1..1000000] do IS_EQUAL_SET(x, y); od; time;
393
gap> x:=[1..100]+1-1;; y:=[1..100]+1-1;; for i in [1..1000000] do IS_EQUAL_SET(x, y); od; time;
113
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.