[systemd-bugs] [Bug 72611] systemctl is-enabled scales poorly with many units

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72611

--- Comment #8 from David Strauss <david at davidstrauss.net> ---
Since most of the time is spent in readlink_and_canonicalize() on the symlinks
in multi-user.target.wants, it would be very helpful to avoid a scan of all
symlinks in *.wants.

Can we assume the name of the symlink is the same as the target? That's
certainly the case with how systemd creates the links. With that assumption, we
could examine a single symlink rather than canonicalizing them all.

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