After this change we never release blocks from memory (in practice it
never happened because the memory limits are never reached). Let the OS
take care of that.
---
On today's systems the 'maxmem' and 'maxmemtot' values are huge (4+ GB)
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-paging mechanism. This is unnecessary and inefficient since the
operating system already has virtual 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.
> 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: 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
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: 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
Presumably due to tarruda's unifdefing, it was already a no-op at the
time of nvim's first commit.
It's probably better to be clear that it doesn't exist, as opposed to
users thinking `:set guipty` is doing something when it isn't.
Remove related dead code and references in the docs.
Helped-By: Michael Reed <m.reed@mykolab.com>
Helped-By: Shougo Matsushita <Shougo.Matsu@gmail.com>
This option has already been removed in the source.
Nvim does not have a GUI, so `nvim -g` does not work.
Also add `macatsui` to the list of removed options.
Regarding |script-here|: despite being a language agnostic piece of
advice, it was in `if_perl.txt`. Regardless, we now only have one
support for one legacy plugin interface, so put it in `if_pyth.txt`
- Removed term.c, term.h and term_defs.h
- Tests for T_* values were removed. screen.c was simplified as a
consequence(the best strategy for drawing is implemented in the UI layer)
- Redraw functions now call ui.c functions directly. Updates are flushed with
`ui_flush()`
- Removed all termcap options(they now return empty strings for compatibility)
- &term/&ttybuiltin options return a constant value(nvim)
- &t_Co is still available, but it mirrors t_colors directly
- Remove cursor tracking from screen.c and the `screen_start` function. Now the
UI is expected to maintain cursor state across any call, and reset it when
resized.
- Remove unused code
refs #1045#1051
This was enabled by default a while ago (#1051), and has apparently not
created any issues. The amount of actual code related to it is tiny, so
it has been removed.
Even when this was finally removed 6 months ago in b2b920f, it had
already been disabled for a while. Due to this, just remove all remnants
of the option as opposed to putting a placeholder like what was done for
'shortname'and 'cryptmethod'.
Closes https://github.com/neovim/docs/pull/26
Also added stubs for 'cryptmethod' and 'key', and placeholders for
explanation regarding removal of crypto functionality.
