A quick first pass, not a real analyzer
Real gas analysis needs a compiler and an understanding of your contract’s actual control flow and storage layout — tools like Slither do that properly. This is a much simpler first pass: recognizing a handful of well-known, high-confidence Solidity patterns directly in the text, entirely in your browser.
How it works
Every check here is chosen specifically because it’s a well-established, broadly-applicable pattern with a low false-positive rate — not an exhaustive list, just the patterns simple enough to recognize reliably without actually compiling the code.