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In version control systems, a repository is a data structure that stores metadata for a set of files or directory structure. [1] Depending on whether the version control system in use is distributed, like Git or Mercurial, or centralized, like Subversion, CVS, or Perforce, the whole set of information in the repository may be duplicated on every user's system or may be maintained on a single ...
git clone [URL], which clones, or duplicates, a git repository from an external URL. git add [file], which adds a file to git's working directory (files about to be committed). git commit -m [commit message], which commits the files from the current working directory (so they are now part of the repository's history). A .gitignore file may be ...
Branch target prediction is not the same as branch prediction, which guesses whether a conditional branch will be taken or not-taken in a binary manner. In more parallel processor designs, as the instruction cache latency grows longer and the fetch width grows wider, branch target extraction becomes a bottleneck. The recurrence is:
Working copies effectively function as remote backups, which avoids relying on one physical machine as a single point of failure. [5] Allows various development models to be used, such as using development branches or a Commander/Lieutenant model. [6] Permits centralized control of the "release version" of the project [citation needed]
In computer architecture, predication is a feature that provides an alternative to conditional transfer of control, as implemented by conditional branch machine instructions. Predication works by having conditional ( predicated ) non-branch instructions associated with a predicate , a Boolean value used by the instruction to control whether the ...
Some logic can be written without branches or with fewer branches. It is often possible to use bitwise operations, conditional moves or other predication instead of branches. [1] [2] In fact, branch-free code is a must for cryptography due to timing attacks. [3]
An indirect jump instruction can choose among more than two branches. Some processors have specialized indirect branch predictors. [17] [18] Newer processors from Intel [19] and AMD [20] can predict indirect branches by using a two-level adaptive predictor. This kind of instruction contributes more than one bit to the history buffer.
An IE conditional comment is delimited the same, but is like: <!-->[if expression]> ... <![endif]--> The conditional comment has two forms. The one above is called downlevel hidden. The other form, called downlevel revealed, is not formatted as a comment yet is called a conditional comment none-the-less. It is formatted like: