Short integer solutions (SIS) Introduction. A disturbance vector [ PDF] is used to find and flip the right bits. This is used to detect changes in such applications as git L7 (and others, I am sure). See Jeff Run: August 2009 - Blogger The open source Git project has just released Git 2.11.0, with features and bugfixes from over 70 contributors. Created by Jack O'Connor, Jean-Philippe Aumasson, Samuel Neves, and Zooko Wilcox-O'Hearn, BLAKE3 combines general purpose The commit author (and committer- they can be different) The date. However, you should be aware of how ridiculously unlikely this scenario is. Could convert to use of git rev-list --abbrev-commit --max-count=1 --format="%h" HEAD to define the short git commit SHA1 hash string and ~always (within the bounds of probability in average software development project) get a unique string length for the repository. With between 2^8 and 2^16 positions on the ladder, the ladder is short enough to be both computable and to have a very low probability of having hash collisions . What makes a git repo not go oversized is that new commits don't duplicate unchanged files. Pro Git. Git - Revision Selection What's new in Git 2.11? - Medium MD5. Anyway, I was also trying to give arguments to defend that 4 bytes don't give us a negligible probability of collision, but with a good hash function that can be useful for a visual versioning control. One billion (2^30) entries a second, 2^25 seconds a year for a a thousand (2^10) years is 2^65 . List the GIT_* environment variables that are local to the repository (e.g. 120-Data-Science-Interview-Questions/probability.md at master - GitHub The parent commit hash. It's not hard to come up with a hash collision for tuples: >>> hash( (1,0,0) ) 2528505496374819208 >>> hash( (1,-2,-2) ) 2528505496374819208 The underlying reason is that the hashing code mixes ^ and *.
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