Dear Pharoers,

thank you all for your time and great contributions! 

Here is a quick performance fix for Nautilus.

In Pharo2.0a #20581 and previous versions, selecting the package menu with my right mouse button lasts too long;

here is why:

95.4% {564ms} NautilusUI(AbstractNautilusUI)>>packageMenuBuilder
  95.4% {564ms} PragmaMenuBuilder class>>withAllPragmaKeywords:model:
    95.4% {564ms} PragmaMenuBuilder>>buildTree
      95.4% {564ms} PragmaMenuBuilder>>collectRegistrations
        90.3% {534ms} CriticBrowser class>>packagesMenu:

Solution, only call CriticsBrowser initialization when this exact menu item is selected.

CriticsBrowser>>packagesMenu: aBuilder
<nautilusGlobalPackageMenu>
(aBuilder item: #'Critics Browser')
action: [ | packages target env rules |
target := aBuilder model.
packages := OrderedCollection new.
target selectedPackages do: [:p |  MCWorkingCopy managersForCategory: p packageName do: [:package | packages add: package]].
rules :=  RBCompositeLintRule allGoodRules.
env := (RBPackageEnvironment new packages: packages ).
self  openOnRule: rules onEnvironment: env];
help: 'Running critics rules on this package'.


Maybe there are more