A developer has created GDSL, a compact 800-line kernel that runs both a Lisp compiler in 500 lines and a C compiler in 1300 lines. This demonstrates that modern compilers need not be millions of lines long. The project challenges the assumption that small compilers require massive feature compromises.

The creator previously believed that any small compiler must make significant tradeoffs, constraining itself to fit within tight limits. However, after building a C subset compiler in 1500 lines, they discovered that the only compromises were unimplemented features rather than fundamental limitations. The same kernel then supported a Lisp compiler without any modifications.

These compilers prove fast enough to be useful and avoid the fragility of highly optimized systems. The project represents 16 months of work and questions what traditional compilers accomplish with their million-plus lines of code. By demonstrating that essential language features can fit in under 2000 lines total, GDSL opens new possibilities for compiler design and educational tools.