Cases in broadcasting columns

[jishnub]

Using arrays

julia> B = brand(5000,5000,0,0); v = rand(size(B,1)); B2 = brand(5000,5000,2,2);

we obtain

Operation	Master	PR
B .* v	32.329 μs	28.289 μs
v .* B	38.244 μs	30.009 μs
B2 .* v	61.873 μs	59.356 μs
v .* B2	83.148 μs	72.213 μs

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.84%. Comparing base (bcedda1) to head (5752977).
⚠️ Report is 172 commits behind head on master.

Files with missing lines	Patch %	Lines
src/generic/broadcast.jl	50.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #324      +/-   ##
==========================================
- Coverage   82.08%   81.84%   -0.24%     
==========================================
  Files          24       24              
  Lines        3321     3333      +12     
==========================================
+ Hits         2726     2728       +2     
- Misses        595      605      +10     

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[jishnub]

I can't really think of tests for the non-standard branches