README
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21
22LOOP INVARIANT COMPUTATIONS
23
24Loop-invariant is any part of a computation within a loop that does not depend
25on the loop variables and whose value does not change as long as control stays
26within the loop. Loop-invarians assignments may be moved out of the loop
27entirely. There may be some situations where you know the value won't vary, but
28the compiler is playing it safe in case of side-effects. "Computation" here
29doesn't mean just arithmetic; array indexing, calls to pure functions are all
30possible candidates for moving out of the loop.
31