[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5907 Rewrite Mutable_properties based on vector<SCM>

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-Rewrite Mutable_properties based on vector<SCM>
+Rewrite Mutable_properties based on `vector<SCM>`

 Alists use are based on linked lists. They have poor locality, which
 introduces more CPU cache misses. Since LilyPond is not multithreaded,

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[issues:#5907] Rewrite Mutable_properties based on vector<SCM>

Status: Started
Created: Mon Apr 13, 2020 08:47 PM UTC by Han-Wen Nienhuys
Last Updated: Tue Apr 14, 2020 07:33 AM UTC
Owner: Han-Wen Nienhuys

Rewrite Mutable_properties based on vector<SCM>

Alists use are based on linked lists. They have poor locality, which
introduces more CPU cache misses. Since LilyPond is not multithreaded,
the CPU sits idle during these misses.

This is part a series of experiments to rearchitect property
storage. None of them seem especially promising currently.

https://codereview.appspot.com/575990043

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