Attempt #2 at making R:I:JSON.from-json faster
Attempt #2 at making R:I:JSON.from-json faster

This time the quick version looks at whether the outer part is an
array, and if so, parses the JSON for outer { } pairs, and then
let's those be parsed in parallel in batches of 32.

This makes parsing of the project.json about 2x as fast, *regardless*
of any special formatting of the JSON.

tony-o/rakudo,salortiz/rakudo,MasterDuke17/rakudo,tony-o/rakudo,salortiz/rakudo,labster/rakudo,nbrown/rakudo,labster/rakudo,tony-o/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,labster/rakudo,nbrown/rakudo,softmoth/rakudo,MasterDuke17/rakudo,labster/rakudo,tony-o/rakudo,softmoth/rakudo,nbrown/rakudo,salortiz/rakudo,softmoth/rakudo,labster/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,nbrown/rakudo,nbrown/rakudo,rakudo/rakudo,tbrowder/rakudo,rakudo/rakudo,Gnouc/rakudo,tbrowder/rakudo,rakudo/rakudo,tbrowder/rakudo,tbrowder/rakudo,tbrowder/rakudo,nbrown/rakudo,MasterDuke17/rakudo,rakudo/rakudo,Gnouc/rakudo,Gnouc/rakudo,tony-o/rakudo,tony-o/rakudo,softmoth/rakudo,labster/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,salortiz/rakudo,MasterDuke17/rakudo,rakudo/rakudo,softmoth/rakudo,Gnouc/rakudo,salortiz/rakudo