code-423n4 / 2021-12-yetifinance-findings

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Cache array length in for loops can save gas #283

Open code423n4 opened 2 years ago

code423n4 commented 2 years ago

Handle

WatchPug

Vulnerability details

Reading array length at each iteration of the loop takes 6 gas (3 for mload and 3 to place memory_offset) in the stack.

Caching the array length in the stack saves around 3 gas per iteration.

Instances include:

kingyetifinance commented 2 years ago

Duplicate #14

alcueca commented 2 years ago

Taking as main