bug#43406: Emacs 27.1 memory consumption grows indefinitely

[zimoun]

> > emacs   27.1    out     
> > /gnu/store/ipgb6s3phz3n740xlcdzaxnbgvncdh11-emacs-27.1

With the exact store item, M-x emacs-uptime says "3 days, 3 hours, 4
minutes, 7 seconds".
My kernel is 4.19.0-10 from Debian.

I use these packages:
            "diminish"
            "yasnippet"
            "smex"
            "counsel"
            "ivy"
            "ivy-rich"
            "magit"
            "debbugs"
            "ag"
            "org"
            "org-contrib"
            "flycheck"
            "auctex"
            "auto-dictionary-mode"
            "ox-pandoc"
            "pandoc-mode"
            "htmlize"
            "org-re-reveal"
            "typo"
            "pdf-tools"
            "paredit"
            "geiser"
            "guix"
            ;; "ess"
            "julia-mode"
            "pyvenv"
            "haskell-mode"
            "tuareg"
            "rust-mode"
            "lua-mode"
            "markdown-mode"
            "google-c-style"
            "graphviz-dot-mode"
            "skewer-mode"
            "ws-butler"
            "fill-column-indicator"
            "page-break-lines"
            "info-plus"
            "keyfreq"
in addition to the ones in core, in case it helps.

Cheers,
simon