Re: [PATCH] describe-doc: clarify default length of abbreviation

Bagas Sanjaya wrote:

On 16/05/21 14.32, Anders Höckersten via GitGitGadget wrote:

quoted

@@ -139,8 +140,11 @@ at the end.
  
  The number of additional commits is the number
  of commits which would be displayed by "git log v1.0.4..parent".
-The hash suffix is "-g" + unambiguous abbreviation for the tip commit
-of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`).
+The hash suffix is "-g" + an unambigous abbreviation for the tip commit
+of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`). The
+length of the abbreviation scales as the repository grows, using the
+approximate number of objects in the repository and a bit of math
+around the birthday paradox, and defaults to a minimum of 7.

What is the birthday paradox then?

It's a probability fact that goes against common sense. In a romm with 23
people you are 50% likely to find two people with the same birthday.

https://en.wikipedia.org/wiki/Birthday_problem

-- 
Felipe Contreras