The main challenge was handling the different on-disk structures (e.g.
mach_header vs mach_header_64). I tried to strike a balance between
sprinkling target->wordSize == 8 checks everywhere (branchy = slow, and ugly)
and templatizing everything (causes code bloat, also ugly). I think I struck a
decent balance by judicious use of type erasure.
Note that LLD-ELF has a similar architecture, though it seems to use more templating.
Linking chromium_framework takes about the same time before and after this
N Min Max Median Avg Stddev x 20 4.52 4.67 4.595 4.5945 0.044423204 + 20 4.5 4.71 4.575 4.582 0.056344803 No difference proven at 95.0% confidence