What's New in v1.10

"The Quality Release" - no new language features. Every change makes Wyn faster, safer, and more stable.

Highlights

• Zero memory leaks - every string, array, and HashMap freed deterministically
• Near-native compute - fib(35): 41ms on current hardware (~23x faster than Python)
• Faster string building - StringBuilder does 1M appends in 14ms. Naive s = s + "x" in a loop is still quadratic: 1M iterations takes ~11.7s. Use StringBuilder for hot loops.
• 50KB binaries - down from a ~425KB unstripped dev build
• .sort() works - was silently a no-op in v1.9, now in-place qsort
• Stdlib APIs fixed - Json, Http, Db, Crypto all work with correct param counts

Performance

Re-measured on current hardware (Apple M3 Pro, macOS 26) with the shipped toolchain, so these are the numbers you get today rather than the ones the original v1.10 announcement quoted:

Benchmark	v1.9	v1.10 (measured today)
fib(35)	slower, unoptimized codegen	41ms
Sort 1M ints	broken (no-op)	124ms
1M StringBuilder appends	n/a	14ms
1M naive s = s + "x"	quadratic, minutes	~11.7s (still quadratic)
1M .len()	slower, leaked	9ms
wyn build (hello, dev)	~4s	288ms
Binary size (--release)	425KB (unstripped dev)	50KB
Memory (1M string ops)	~3GB (leaked)	1.5MB

Memory Safety

• 50+ string functions converted to RC-tracked allocation
• All buffer overflows eliminated (6 fixed-size buffers → dynamic)
• Thread-safe RC with atomic CAS operations
• Concurrent string operations: 30/30 correct, zero crashes
• Verified with AddressSanitizer + UndefinedBehaviorSanitizer

Bug Fixes

• .sort() was a no-op - codegen discarded the sorted copy
• String array .sort() - used int comparator instead of strcmp
• Signed division - -7 / 2 gave -4 instead of -3
• Division by zero - now panics with clear message (was silent 0)
• Triple method chain - "hello".trim().upper().reverse() crashed
• Stdlib param counts - all builtin module functions had hardcoded 1-param limit
• Method chain leak - "hello".upper().trim() leaked the intermediate
• println/print leak - println(x.to_string()) leaked every call

Testing

• 110 unit tests + 32 expect/regression tests = 142 total
• All tests pass on macOS, Linux, Windows (ARM + x64)
• Zero ASan/UBSan errors

Other Releases

• What's New in v1.11 - developer experience
• What's New in v1.9 - generators, debugger