tuple concatenation in v0.7.0-dev is worse

[JeffreySarnoff]

just in case this is not present as another issue
Details are from a discourse post

[vtjnash]

resolved in discourse

[pablosanjose]

This is still not quite resolved, I think. If I try the proposed solution

@inline tuplejoin(x) = x
@inline tuplejoin(x, y) = (x..., y...)
@inline tuplejoin(x, y, z...) = (x..., tuplejoin(y, z...)...)

to concatenate tuples of different lengths, current master (well, 16 days old) still allocates and slows down relative to v0.6.

In v0.7

julia> @btime tuplejoin((1,2),(1,2,3),(1,2,4,5),(1,2),(1,2),(1,2));
  253.331 ns (1 allocation: 128 bytes)

While in v0.6

julia> @btime tuplejoin((1,2),(1,2,3),(1,2,4,5),(1,2),(1,2),(1,2));
  4.512 ns (0 allocations: 0 bytes)

[vtjnash]

duplicate of #22545

[truedichotomy]

Where did tuplejoin go in the latest version of Julia? I can't find it anywhere.

[pablosanjose]

I don't think it was ever part of Base.