batch reading for TBaskets

[Moelf]

fix #358

thanks @alexander-held for reminding me to benchmark again

julia> f() = LazyTree("3148230F-FC33-5240-8EFC-89FF45563A47.root", "Events", r"^Muon")[:]

# before
julia> df = @time f();
 18.882730 seconds (128.33 M allocations: 8.914 GiB, 32.75% gc time, 2.42% compilation time)

julia> df = @time f();
 18.590407 seconds (127.94 M allocations: 8.895 GiB, 33.37% gc time)

# after
julia> df = @time f();
 10.531039 seconds (1.54 M allocations: 5.355 GiB, 12.92% gc time)

julia> df = @time f();
 10.691377 seconds (1.65 M allocations: 5.125 GiB, 12.52% gc time, 1.78% compilation time)

julia> df = @time f();
 11.042397 seconds (1.54 M allocations: 5.119 GiB, 10.94% gc time)

for comparison, uproot

In [15]: %%time
    ...: with up.open("./3148230F-FC33-5240-8EFC-89FF45563A47.root") as f:
    ...:     df = f["Events"].arrays(filter_name="Muon*")
CPU times: user 10.5 s, sys: 122 ms, total: 10.6 s
Wall time: 10.5 s

[codecov]

Codecov Report

Attention: Patch coverage is 84.61538% with 2 lines in your changes missing coverage. Please review.

Project coverage is 84.71%. Comparing base (1b190d2) to head (cc3a2f7).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/iteration.jl	84.61%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #359      +/-   ##
==========================================
- Coverage   84.72%   84.71%   -0.02%     
==========================================
  Files          21       21              
  Lines        3084     3094      +10     
==========================================
+ Hits         2613     2621       +8     
- Misses        471      473       +2     

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[tamasgal]

Awesome, release! 😆