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benchmark: https://gist.github.com/ofseed/6224529d77c016c36f7ab2f977059848 local rounds = tonumber(arg[1]) or 1000 local count = tonumber(arg[2]) or 1000 -- Load the table.clear function. local clear = require("table.clear") local function fill(t, n) for i = 1, n do t[i] = i end end local function bench_reassign(n_rounds, n_items) local t = {} local start = os.clock() for _ = 1, n_rounds do t = {} collectgarbage("collect") fill(t, n_items) end return os.clock() - start end local function bench_reassign_no_gc(n_rounds, n_items) local t = {} local start = os.clock() for _ = 1, n_rounds do t = {} fill(t, n_items) end return os.clock() - start end local function bench_clear(n_rounds, n_items) local t = {} local start = os.clock() for _ = 1, n_rounds do clear(t) fill(t, n_items) end return os.clock() - start end -- Warm up LuaJIT before the real benchmark. do local t = {} for _ = 1, 2000 do clear(t) fill(t, count) end end collectgarbage("collect") local reassign_time = bench_reassign(rounds, count) collectgarbage("collect") local reassign_no_gc_time = bench_reassign_no_gc(rounds, count) collectgarbage("collect") local clear_time = bench_clear(rounds, count) print(string.format("rounds=%d count=%d", rounds, count)) print(string.format("t = {} + GC : %.6f s", reassign_time)) print(string.format("t = {} : %.6f s", reassign_no_gc_time)) print(string.format("table.clear : %.6f s", clear_time)) print(string.format("vs + GC : %.2fx", reassign_time / clear_time)) print(string.format("vs no GC : %.2fx", reassign_no_gc_time / clear_time)) benchmark result: rounds=1000 count=1000 t = {} + GC : 0.022469 s t = {} : 0.002570 s table.clear : 0.000387 s vs + GC : 58.06x vs no GC : 6.64x `count` is how many items the table has, and `round` is how many rounds we fill the table, clear, and then refill it. `table = {}` is clear the table by resigning a new empty one, because this script does not run persistently like nvim so GC is not triggered, so I added another extreme control group that manually triggers GC.
Neovim is a project that seeks to aggressively refactor Vim in order to:
- Simplify maintenance and encourage contributions
- Split the work between multiple developers
- Enable advanced UIs without modifications to the core
- Maximize extensibility
See the Introduction wiki page and Roadmap for more information.
Features
- Modern GUIs
- API access from any language including C/C++, C#, Clojure, D, Elixir, Go, Haskell, Java/Kotlin, JavaScript/Node.js, Julia, Lisp, Lua, Perl, Python, Racket, Ruby, Rust
- Embedded, scriptable terminal emulator
- Asynchronous job control
- Shared data (shada) among multiple editor instances
- XDG base directories support
- Compatible with most Vim plugins, including Ruby and Python plugins
See :help nvim-features for the full list, and :help news for noteworthy changes in the latest version!
Install from package
Pre-built packages for Windows, macOS, and Linux are found on the Releases page.
Managed packages are in Homebrew, Debian, Ubuntu, Fedora, Arch Linux, Void Linux, Gentoo, and more!
Install from source
See BUILD.md and supported platforms for details.
The build is CMake-based, but a Makefile is provided as a convenience. After installing the dependencies, run the following command.
make CMAKE_BUILD_TYPE=RelWithDebInfo
sudo make install
To install to a non-default location:
make CMAKE_BUILD_TYPE=RelWithDebInfo CMAKE_INSTALL_PREFIX=/full/path/
make install
CMake hints for inspecting the build:
cmake --build build --target helplists all build targets.build/CMakeCache.txt(orcmake -LAH build/) contains the resolved values of all CMake variables.build/compile_commands.jsonshows the full compiler invocations for each translation unit.
Transitioning from Vim
See :help nvim-from-vim for instructions.
Project layout
├─ cmake/ CMake utils
├─ cmake.config/ CMake defines
├─ cmake.deps/ subproject to fetch and build dependencies (optional)
├─ runtime/ plugins and docs
├─ src/nvim/ application source code (see src/nvim/README.md)
│ ├─ api/ API subsystem
│ ├─ eval/ Vimscript subsystem
│ ├─ event/ event-loop subsystem
│ ├─ generators/ code generation (pre-compilation)
│ ├─ lib/ generic data structures
│ ├─ lua/ Lua subsystem
│ ├─ msgpack_rpc/ RPC subsystem
│ ├─ os/ low-level platform code
│ └─ tui/ built-in UI
└─ test/ tests (see test/README.md)
License
Neovim contributions since b17d96 are licensed under the
Apache 2.0 license, except for contributions copied from Vim (identified by the
vim-patch token). See LICENSE.txt for details.