[TUHS] screen editors

[Derek Fawcus]

On Tue, Jan 07, 2020 at 03:45:24PM -0500, Chet Ramey wrote:
> On my Mac OS X machine, it's about ten times smaller than vim
> 
> $ size /usr/local/bin/ce
> __TEXT	__DATA	__OBJC	others	dec	hex
> 114688	339968	0	4295024640	4295479296	10007d000
> $ size /usr/bin/vim
> __TEXT	__DATA	__OBJC	others	dec	hex
> 1687552	176128	0	4295016448	4296880128	1001d3000
> 
> Similar numbers on RHEL 7, but due to the large bss, it's only about
> 45% smaller than vim.

So I got curious about those large numbers on the mac, and made use of 'otool -l'.

It would seem that the values for __DATA reported by size correspond to the overall
size of the 'load command' for the __DATA segment, and so includes bss as well.

$ ls -l /usr/bin/vim
-rwxr-xr-x  1 root  wheel  1530064 29 Jun  2018 /usr/bin/vim

So 'size' on the mac is not so useful, but 'size -m /usr/bin/vim' gives
information from which one could derive the normal 'size' output.

$ size -m /usr/bin/vim
Segment __PAGEZERO: 4294967296
Segment __TEXT: 1388544
	Section __text: 1271745
	Section __stubs: 1044
	Section __stub_helper: 1756
	Section __cstring: 85892
	Section __const: 14672
	Section __unwind_info: 8944
	total 1384053
Segment __DATA: 155648
	Section __got: 1056
	Section __nl_symbol_ptr: 16
	Section __la_symbol_ptr: 1392
	Section __const: 38608
	Section __data: 64432
	Section __bss: 42520
	Section __common: 5720
	total 153744
Segment __LINKEDIT: 36864
total 4296548352

DF