Benchmark exercises full save×load matrix across Python/C/asm plus the
mismatch cases (wrong format, truncated input, missing file, corrupt
header). Cases that used to segfault or report wrong paths now degrade
cleanly.
asm (uncommonlisp.s):
- (define var) with no value now binds to VOID instead of segfault
- portal-resume checks sys_read returned full 48-byte header; sanity-
checks heap_size and heap_base before committing r14/r15 restore.
Corrupt/truncated portals now return #f cleanly.
py (uncommonlisp.py):
- file-not-found error inside a nested (load) now reports the actual
missing path (via FileNotFoundError.filename) rather than the outer
script path.
- _load wraps UnicodeDecodeError (binary file loaded as text) into a
LispErr with the path; no more raw Python traceback.
tests/portal-benchmark.sh: 50-iter benchmark, 4 parts
(save / load / cross-process / mismatch-classification).
Representative numbers (this laptop, 2026-04-16):
setup+save: Python 126ms, C 3ms, asm 0.9ms
cross-proc: Py→Py 260ms, C→C 6ms, asm→asm 1.5ms
All three test suites still pass: 571 py unit, 131 asm, 189 shared.
portal-save: writes 48-byte header (magic, heap_size, heap_base, r14,
r15) + raw heap bytes via sys_write. 9.8KB for a state with fib(20).
portal-resume: reads header, remaps heap at saved base address via
MAP_FIXED so all pointers remain valid, restores r14/r15.
Binary format — no JSON, no parsing. Just bytes in, bytes out.
Carry on USB to air-gapped machine, resume from exact state.
Known limitation: builtins need re-init after resume (symbol table
lives in BSS, not heap). User-defined data survives intact.
108 existing tests pass.
No C. No libc. Just Linux syscalls and machine instructions.
2592 lines of GNU assembler. 13KB stripped binary. 1.8MB resident.
Features: quote, if, define, set!, lambda, begin, let, named-let,
cond, and, or. 34 builtins. Tag-in-low-bits values. Bump allocator
on mmap'd pages. TCO via jmp. Symbol interning.
Runs: (fact 10)=3628800, (fib 35)=9227465, (ack 3 4)=125.
24 tests pass. Zero dependencies.
"If you vibe code in assembly, you don't even need a compiler."
