# Nerd-sniping: can you make this faster?

**URL:** <https://discourse.julialang.org/t/nerd-sniping-can-you-make-this-faster/132793>\
**Category:** Performance\
**Created:** [September 30, 2025, 8:10pm UTC](https://discourse.julialang.org/t/nerd-sniping-can-you-make-this-faster/132793 "2025-09-30T20:10:34Z")\
**Posts on this page:** 1\
**Showing post:** 35

<div class="post-metadata">

**Author:** ![lmiq](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lmiq/32/18314_2.png) [@lmiq](https://discourse.julialang.org/u/lmiq)\
**Post date:** [October 2, 2025, 4:58pm UTC](https://discourse.julialang.org/t/nerd-sniping-can-you-make-this-faster/132793/35 "2025-10-02T16:58:51Z")

</div>

Yes, I confirm the regression:

```julia-auto
julia> @benchmark update_dot_exposure!($(data_soa())...)
BenchmarkTools.Trial: 10000 samples with 994 evaluations per sample.
 Range (min … max): 31.229 ns … 72.302 ns ┊ GC (min … max): 0.00% … 0.00%
 Time (median): 31.284 ns ┊ GC (median): 0.00%
 Time (mean ± σ): 31.424 ns ± 0.680 ns ┊ GC (mean ± σ): 0.00% ± 0.00%

  ▃█▇▁ ▁ ▂▄ ▁
  ████▅▄▄▁▁▁▃▁▁▃▃▄▃▁▁▃▃▁▁▄▃▄▁▃▃▃▁▃▃▇████▇▆▆▅▅▅▄▄▄▅▄▄▃▃▅▄▄▃▁██ █
  31.2 ns Histogram: log(frequency) by time 32.9 ns <

 Memory estimate: 0 bytes, allocs estimate: 0.

```

vs [Nerd-sniping: can you make this faster? - #25 by lmiq](https://discourse.julialang.org/t/nerd-sniping-can-you-make-this-faster/132793/25)

edit: although in my actual application it is much smaller:

```bash
% time julia +1.12 --project -e "using PDBTools; @time(sasa(atomic_sasa(read_pdb(\"6co8.pdb\"))))"
  5.331173 seconds (55.80 M allocations: 1.993 GiB, 21.69% gc time, 3.27% compilation time)

real	0m5,899s
user	0m6,837s
sys	0m0,339s

#vs

% time julia +1.11 --project -e "using PDBTools; @time(sasa(atomic_sasa(read_pdb(\"6co8.pdb\"))))"
  4.853135 seconds (55.80 M allocations: 1.987 GiB, 17.68% gc time, 0.22% compilation time: 100% of which was recompilation)

real	0m5,400s
user	0m6,273s
sys	0m0,391s

```

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