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Re:Dart team posts an example of fast code with 22ms for a “... by CraftThatBlock on Thursday May 07, 2020 @05:02PM (#23108278)
This is like saying a game runs at 0.1fps because it took a couple seconds to load at the start.

This is initial load time. Printing likely account for <1% of the actual time, the rest being initializing the program

Re:Dart team posts an example of fast code with 22ms for a “... by dmitriid on Friday May 08, 2020 @04:20AM (#23112581)
Other examples in the thread show people routinely outputting "Hello, world" from cold start in under 5ms.