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

[Auto mailings of changes to Lily Issues via Testlilyissues-auto]

My though was to delete this issue on SF (not talking about Rietveld), which you didn't create for the first upload. Doesn't matter anymore, I've added the missing title and description.

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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 07:34 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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