A benchmark showing issue #1252

[RogerKratz]

running this benchmark will allocate more and more memory without releasing it.

[codecov]

Codecov Report

Merging #1253 (7b30707) into develop (3ca27f8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #1253   +/-   ##
========================================
  Coverage    76.34%   76.34%           
========================================
  Files          185      185           
  Lines         4870     4870           
  Branches      1004     1004           
========================================
  Hits          3718     3718           
  Misses         679      679           
  Partials       473      473           

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[tillig]

I'll respond to this in #1252. Thanks!