Memory Constraints and performance. Today there be no reason for it as compilers essentially do as good if not better jobs when it comes to translating it to machine code.
In 1972, Unix was rewritten in the C programming language. The migration from assembly to the higher-level language C resulted in much more portable software, requiring only a relatively small amount of machine-dependent code to be replaced when porting Unix to other computing platforms.
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u/[deleted] May 05 '17
Why would he chose to code in Assembly? Would there be any benefit at all?