Feature #10302: [PATCH] marshal.c: lazy compat_tbl allocation

• Status: Closed
• Assignee: normalperson (Eric Wong)
• Target version: -

[normalperson (Eric Wong)]

Will commit in a few days.

In some common cases, compat_tbl is unused in dump_arg/load_arg,
so avoid malloc/free costs for the unused table.

ruby -e 'h = {a: :b}; 600000.times { Marshal.load(Marshal.dump(h)) }'

before:
	real    0m2.458s
	user    0m2.450s
	sys     0m0.006s

after:
	real    0m2.122s
	user    0m2.110s
	sys     0m0.011s

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)

Seems fine.

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Assigned

[normalperson (Eric Wong)]

• Status changed from Assigned to Closed

r47756