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In case of msg.sender, reading from memory consumes 3 gas (mload opcode) and getting the address of the sender consumes 2 gas (caller opcode). Essentially, saving the variable in memory and reading it afterwards is more expensive than using msg.sender every time.

Uroš Ognjenović
– Uroš Ognjenović

2024-12-19 11:35:29 +00:00
Commented Dec 19, 2024 at 11:35
In his case he's not using mload but reading from the stack. So it's all about stack manipulation (DUP, POP, etc..)

0xSanson
– 0xSanson

2024-12-19 13:58:49 +00:00
Commented Dec 19, 2024 at 13:58

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