Remove tail recursion

[krlmlr]

for better profiles.

[codecov-commenter]

Codecov Report

Merging #1113 (35c605d) into main (940010d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 35c605d differs from pull request most recent head 9702a77. Consider uploading reports for the commit 9702a77 to get more accurate results

@@           Coverage Diff           @@
##             main    #1113   +/-   ##
=======================================
  Coverage   91.07%   91.07%           
=======================================
  Files          46       46           
  Lines        2712     2713    +1     
=======================================
+ Hits         2470     2471    +1     
  Misses        242      242           

Impacted Files	Coverage Δ
R/nest.R	100.00% <100.00%> (ø)
R/roxygen-examples-parse.R	96.82% <100.00%> (ø)

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[github-actions]

This is how benchmark results would change (along with a 95% confidence interval in relative change) if 940010d is merged into main:

•   :ballot_box_with_check:cache_applying: 363ms -> 363ms [-1.77%, +1.98%]
•   :ballot_box_with_check:cache_recording: 1.69s -> 1.68s [-1.45%, +0.78%]
•   :rocket:without_cache: 3.46s -> 3.43s [-1.87%, -0.12%]

Further explanation regarding interpretation and methodology can be found in the documentation.

[lorenzwalthert]

Thanks @krlmlr :D