Zef::CLI getting pre-compiled again and again??

[lizmat]

Not sure whether this is a Rakudo issue, or a zef issue, but feels more like a zef issue to me, so reporting here for now.

After a re-compile of the Rakudo setting, trying to install a module appears to re-precompile Zef::CLI many times:

$ RAKUDO_PRECOMPILATION_PROGRESS=1 zef install Today
Precompiling Zef::CLI
 Precompiling Zef
 Precompiling Zef::Client
  Precompiling Zef::Distribution
   Precompiling Zef::Distribution::DependencySpecification
    Precompiling Zef::Identity
   Precompiling Zef::Utils::SystemQuery
  Precompiling Zef::Distribution::Local
  Precompiling Zef::Repository
  Precompiling Zef::Utils::FileSystem
  Precompiling Zef::Fetch
  Precompiling Zef::Extract
  Precompiling Zef::Build
  Precompiling Zef::Test
  Precompiling Zef::Install
  Precompiling Zef::Report
 Precompiling Zef::Config
 Precompiling Zef::Utils::URI
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
 Precompiling Zef::Service::Shell::PowerShell
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
Precompiling Zef::CLI
All candidates are currently installed
No reason to proceed. Use --force-install to continue anyway

This feels like pointing to an unexpected issue causing slowdown?

Also, on an already pre-compiled zef, installing a module that wasn't installed yet, appears to re-precompile Zef::CLI yet again:

$ RAKUDO_PRECOMPILATION_PROGRESS=1 zef install Today
===> Searching for: Today
===> Testing: Today:ver<0.0.5>:auth<zef:lizmat>
[Today]  Precompiling Today
===> Testing [OK] for Today:ver<0.0.5>:auth<zef:lizmat>
===> Installing: Today:ver<0.0.5>:auth<zef:lizmat>
Precompiling Zef::CLI

[ugexe]

Personally I'm inclined to think this is a rakudo issue seeing as installation is really just CURI.install(...). zef has nothing to do with precompilation of any kind, thats entirely an implementation detail of rakudo