Choosing a Variant

Lace ships three variants that trade task struct size against available parameter space:

Header	CMake target	Task size	Space for parameters + result
lace32.h	lace::lace32	32 bytes	16 bytes
lace.h	lace::lace	64 bytes	48 bytes
lace128.h	lace::lace128	128 bytes	112 bytes

The 16-byte overhead is fixed (function pointer and thief status field). A static_assert in the generated code catches it at compile time if a task’s parameters and return type exceed the available space.

The standard lace.h variant supports up to 10 parameters. The lace128.h variant supports up to 14 parameters. The lace32.h variant is primarily intended for architectures with 32-byte cache lines.