[fingolfin]

ConvertToVectorRep(v, q) for a GF(2) vector v, and CopyToVectorRep(v, q) for a GF(2) or GF(q0) vector v, with GF(q) a larger field, took the generic path, which inspects every entry in GAP code. The kernel rewrites such vectors directly.

Setup:

gap> L:= List(IdentityMat(600, GF(2)), ShallowCopy);;

Before:

gap> M:= List(L, v -> CopyToVectorRep(v, 4));; time;
100
gap> M:= List(M, v -> CopyToVectorRep(v, 16));; time;
92
gap> for v in L do ConvertToVectorRep(v, 4); od; time;
99

After:

gap> M:= List(L, v -> CopyToVectorRep(v, 4));; time;
2
gap> M:= List(M, v -> CopyToVectorRep(v, 16));; time;
1
gap> for v in L do ConvertToVectorRep(v, 4); od; time;
1

Assisted-by: Generative AI

[codecov]

Codecov Report

❌ Patch coverage is 78.94737% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.93%. Comparing base (22ae5a8) to head (c48d35d).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
hpcgap/lib/vecmat.gi	57.89%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6817      +/-   ##
==========================================
+ Coverage   79.90%   79.93%   +0.03%     
==========================================
  Files         685      685              
  Lines      295909   296036     +127     
  Branches     8696     8672      -24     
==========================================
+ Hits       236432   236628     +196     
+ Misses      57664    57594      -70     
- Partials     1813     1814       +1     

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