The Memory Usage on Benchmarks section shows CRuby as one of the bars. It is the lowest across the board. YJIT, being implemented in CRuby, uses at least as muc

The Memory Usage on Benchmarks section shows CRuby as one of the bars. It is the lowest across the board. YJIT, being implemented in CRuby, uses at least as much memory as CRuby in all the benchmarks (you could maybe imagine one day JIT’d code using less memory in specific situations by compiling code to a more efficient algorithm that skips allocations the interpreter would make, but it appears that is not the case yet today).