> The option 'maxmem' ('mm') is used to set the maximum memory used for one
> buffer (in kilobytes). 'maxmemtot' is used to set the maximum memory used for
> all buffers (in kilobytes). The defaults depend on the system used. These
> are not hard limits, but tell Vim when to move text into a swap file. If you
> don't like Vim to swap to a file, set 'maxmem' and 'maxmemtot' to a very large
> value. The swap file will then only be used for recovery. If you don't want
> a swap file at all, set 'updatecount' to 0, or use the "-n" argument when
> starting Vim.
On today's systems these values are huge (4GB in my machine with 8GB of RAM
since it's set as half the available memory by default) so the limits are
never reached in practice, but Vim wastes a lot of time checking if the limit
was reached.
If the limit is reached Vim starts saving pieces of the swap file that were in
memory to the disk. Said in a different way: Vim implements its own memory
swapping mechanism. This is unnecessary and inefficient since the operating
system already virtualized the memory and will swap to the disk if programs
start using too much memory.
This change does...
1. Reduce the number of config options and need for documentation.
2. Make the code more efficient as we don't have to keep track of memory usage
nor check if the memory limits were reached to start swapping to disk every
time we need memory for buffers.
3. Simplify the code. Once `memfile.c` is simple enough it could be replaced by
actual operating system memory mapping (`mmap`, `MemoryViewOfFile`...).
This change does not prevent Vim to recover changes from swap files since the
swapping code is never triggered with the huge limits set by default.
Problem: The 'langnoremap' option leads to double negatives. And it does
not work for the last character of a mapping.
Solution: Add 'langremap' with the opposite value. Keep 'langnoremap' for
backwards compatibility. Make it work for the last character of a
mapping. Make the test work.
920694c1b6
Make the 'scrollback' option work like most other buffer-local options:
- `:set scrollback=x` sets the global and local value
- `:setglobal scrollback=x` sets only the global default
- new terminal buffers inherit the global
Normal buffers are still always -1, and :setlocal there is an error.
Closes#6337
Problem: 'formatprg' is a global option but the value may depend on the
type of buffer. (Sung Pae)
Solution: Make 'formatprg' global-local. (closesvim/vim#1380)
9be7c04e6c
Problem: There is no equivalent of 'smartcase' for a tag search.
Solution: Add value "followscs" and "smart" to 'tagcase'. (Christian
Brabandt, closesvim/vim#712) Turn tagcase test into new style.
66e29d7112
'inccommand' allows us to expand the feature to other commands, such as:
:cdo
:cfdo
:global
Also rename "IncSubstitute" highlight group to "Substitute".
All options are accessed by passing char_u pointers around, casting the
pointer to the right pointer type for the specific option, and then
dereferencing that pointer.
This dance works fine on little-endian systems when some bool options
are int types (as in Vim) and some are bool types (as would make more
sense), but on big-endian systems *(int *)varp when varp is pointing to
a bool will read random memory.
Therefore, all boolean options must remain a consistent type and int is
currently the easiest to choose.
Originally implemented by
* Clement0
* DesbyP
* aym7
* Adrey06
* Robinhola
in #4811. Major reworkings and bug
fixes by
* bfredl
Most tests suggested by ZyX-l, suggestions for improvements by oni-link.
vim-patch:7.4.2109
Problem: Setting 'display' to "lastline" is a drastic change, while
omitting it results in lots of "@" lines.
Solution: Add "truncate" to show "@@@" for a truncated line.
ad9c2a08f0
Problem: Although emoji characters are ambiguous width, best is to treat
them as full width.
Solution: Update the Unicode character tables. Add the 'emoji' options.
(Yasuhiro Matsumoto)
3848e00e01
Problem: 'cscopequickfix' option does not accept new value "a".
Solution: Adjust list of command characters. (Ken Takata)
6d20e17544
All changes applied manually. Definition of `CSQF_CMDS` was moved to
`option_defs.h` in nvim.
TODO: Only works at startup (i.e., in the user's init.vim/vimrc/--cmd),
but it should probably work at any time.
---
patch 7.4.1799
Problem: 'guicolors' is a confusing option name.
Solution: Use 'termguicolors' instead. (Hirohito Higashi)
61be73bb0f
patch 7.4.1806
Problem: 'termguicolors' option missing from the options window.
Solution: Add the entry.
8e3d1b6326
patch 7.4.1808
Problem: Using wrong feature name to check for 'termguicolors'.
Solution: Use the right feature name. (Ken Takata)
8a24b794b8
patch 7.4.1809
Problem: Using wrong short option name for 'termguicolors'.
Solution: Use the option name.
868cfc19bb
Problem: User may yank or put using the register being recorded in.
Solution: Add the recording register in the message. (Christian Brabandt,
closesvim/vim#470)
a0ed84a268
Problem: Cannot specify a vertical split when loading a buffer for a
quickfix command.
Solution: Add the "vsplit" value to 'switchbuf'. (Brook Hong)
a594d77ffc
Problem: On some systems automatically adding the missing EOL causes
problems. Setting 'binary' has too many side effects.
Solution: Add the 'fixeol' option, default on. (Pavel Samarkin)
34d72d4b6c
- CPO_ALL and CPO_VI are identical, so merge them
- No longer check for the environment variable 'VIM_POSIX'
- In vim_diff.txt, mention the removal of 'cpoptions' flags
