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performance improvements (#116)

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closes #111
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Barrett Ruth 2026-02-12 16:59:13 -05:00 • committed by GitHub
parent 330e2bc9b8
commit 9a0b812f69
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10 changed files with 590 additions and 104 deletions
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302
lua/diffs/init.lua
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@ -54,8 +54,7 @@
---@field keymaps diffs.ConflictKeymaps
---@class diffs.Config
---@field debug boolean
---@field debounce_ms integer
---@field debug boolean|string
---@field hide_prefix boolean
---@field highlights diffs.Highlights
---@field fugitive diffs.FugitiveConfig
@ -107,7 +106,6 @@ end
---@type diffs.Config
local default_config = {
debug = false,
debounce_ms = 0,
hide_prefix = false,
highlights = {
background = true,
@ -162,12 +160,26 @@ local config = vim.deepcopy(default_config)
local initialized = false
---@diagnostic disable-next-line: missing-fields
local fast_hl_opts = {} ---@type diffs.HunkOpts
---@type table<integer, boolean>
local attached_buffers = {}
---@type table<integer, boolean>
local diff_windows = {}
---@class diffs.HunkCacheEntry
---@field hunks diffs.Hunk[]
---@field tick integer
---@field highlighted table<integer, true>
---@field pending_clear boolean
---@field line_count integer
---@field byte_count integer
---@type table<integer, diffs.HunkCacheEntry>
local hunk_cache = {}
---@param bufnr integer
---@return boolean
function M.is_fugitive_buffer(bufnr)
@ -177,53 +189,108 @@ end
local dbg = log.dbg
---@param bufnr integer
local function highlight_buffer(bufnr)
if not vim.api.nvim_buf_is_valid(bufnr) then
return
end
vim.api.nvim_buf_clear_namespace(bufnr, ns, 0, -1)
local hunks = parser.parse_buffer(bufnr)
dbg('found %d hunks in buffer %d', #hunks, bufnr)
for _, hunk in ipairs(hunks) do
highlight.highlight_hunk(bufnr, ns, hunk, {
hide_prefix = config.hide_prefix,
highlights = config.highlights,
})
local function invalidate_cache(bufnr)
local entry = hunk_cache[bufnr]
if entry then
entry.tick = -1
entry.pending_clear = true
end
end
---@param bufnr integer
---@return fun()
local function create_debounced_highlight(bufnr)
local timer = nil ---@type table?
return function()
if timer then
timer:stop() ---@diagnostic disable-line: undefined-field
timer:close() ---@diagnostic disable-line: undefined-field
timer = nil
end
local t = vim.uv.new_timer()
if not t then
highlight_buffer(bufnr)
local function ensure_cache(bufnr)
if not vim.api.nvim_buf_is_valid(bufnr) then
return
end
local tick = vim.api.nvim_buf_get_changedtick(bufnr)
local entry = hunk_cache[bufnr]
if entry and entry.tick == tick then
return
end
if entry and not entry.pending_clear then
local lc = vim.api.nvim_buf_line_count(bufnr)
local bc = vim.api.nvim_buf_get_offset(bufnr, lc)
if lc == entry.line_count and bc == entry.byte_count then
entry.tick = tick
entry.pending_clear = true
dbg('content unchanged in buffer %d (tick %d), skipping reparse', bufnr, tick)
return
end
timer = t
t:start(
config.debounce_ms,
0,
vim.schedule_wrap(function()
if timer == t then
timer = nil
t:close()
end
if vim.api.nvim_buf_is_valid(bufnr) then
highlight_buffer(bufnr)
end
end)
)
end
local hunks = parser.parse_buffer(bufnr)
local lc = vim.api.nvim_buf_line_count(bufnr)
local bc = vim.api.nvim_buf_get_offset(bufnr, lc)
dbg('parsed %d hunks in buffer %d (tick %d)', #hunks, bufnr, tick)
hunk_cache[bufnr] = {
hunks = hunks,
tick = tick,
highlighted = {},
pending_clear = true,
line_count = lc,
byte_count = bc,
}
local has_nil_ft = false
for _, hunk in ipairs(hunks) do
if not has_nil_ft and not hunk.ft and hunk.filename then
has_nil_ft = true
end
end
if has_nil_ft and vim.fn.did_filetype() ~= 0 then
vim.schedule(function()
if vim.api.nvim_buf_is_valid(bufnr) and hunk_cache[bufnr] then
dbg('retrying filetype detection for buffer %d (was blocked by did_filetype)', bufnr)
invalidate_cache(bufnr)
end
end)
end
end
---@param hunks diffs.Hunk[]
---@param toprow integer
---@param botrow integer
---@return integer first
---@return integer last
local function find_visible_hunks(hunks, toprow, botrow)
local n = #hunks
if n == 0 then
return 0, 0
end
local lo, hi = 1, n + 1
while lo < hi do
local mid = math.floor((lo + hi) / 2)
local h = hunks[mid]
local bottom = h.start_line - 1 + #h.lines - 1
if bottom < toprow then
lo = mid + 1
else
hi = mid
end
end
if lo > n then
return 0, 0
end
local first = lo
local h = hunks[first]
local top = (h.header_start_line and (h.header_start_line - 1)) or (h.start_line - 1)
if top >= botrow then
return 0, 0
end
local last = first
for i = first + 1, n do
h = hunks[i]
top = (h.header_start_line and (h.header_start_line - 1)) or (h.start_line - 1)
if top >= botrow then
break
end
last = i
end
return first, last
end
local function compute_highlight_groups()
@ -327,8 +394,13 @@ local function init()
local opts = vim.g.diffs or {}
vim.validate({
debug = { opts.debug, 'boolean', true },
debounce_ms = { opts.debounce_ms, 'number', true },
debug = {
opts.debug,
function(v)
return v == nil or type(v) == 'boolean' or type(v) == 'string'
end,
'boolean or string (file path)',
},
hide_prefix = { opts.hide_prefix, 'boolean', true },
highlights = { opts.highlights, 'table', true },
})
@ -441,9 +513,6 @@ local function init()
end
end
if opts.debounce_ms and opts.debounce_ms < 0 then
error('diffs: debounce_ms must be >= 0')
end
if
opts.highlights
and opts.highlights.context
@ -498,13 +567,113 @@ local function init()
config = vim.tbl_deep_extend('force', default_config, opts)
log.set_enabled(config.debug)
fast_hl_opts = {
hide_prefix = config.hide_prefix,
highlights = vim.tbl_deep_extend('force', config.highlights, {
treesitter = { enabled = false },
}),
defer_vim_syntax = true,
}
compute_highlight_groups()
vim.api.nvim_create_autocmd('ColorScheme', {
callback = function()
compute_highlight_groups()
for bufnr, _ in pairs(attached_buffers) do
highlight_buffer(bufnr)
invalidate_cache(bufnr)
end
end,
})
vim.api.nvim_set_decoration_provider(ns, {
on_buf = function(_, bufnr)
if not attached_buffers[bufnr] then
return false
end
local t0 = config.debug and vim.uv.hrtime() or nil
ensure_cache(bufnr)
local entry = hunk_cache[bufnr]
if entry and entry.pending_clear then
vim.api.nvim_buf_clear_namespace(bufnr, ns, 0, -1)
entry.highlighted = {}
entry.pending_clear = false
end
if t0 then
dbg('on_buf %d: %.2fms', bufnr, (vim.uv.hrtime() - t0) / 1e6)
end
end,
on_win = function(_, _, bufnr, toprow, botrow)
if not attached_buffers[bufnr] then
return false
end
local entry = hunk_cache[bufnr]
if not entry then
return
end
local first, last = find_visible_hunks(entry.hunks, toprow, botrow)
if first == 0 then
return
end
local t0 = config.debug and vim.uv.hrtime() or nil
local deferred_syntax = {}
local count = 0
for i = first, last do
if not entry.highlighted[i] then
local hunk = entry.hunks[i]
highlight.highlight_hunk(bufnr, ns, hunk, fast_hl_opts)
entry.highlighted[i] = true
count = count + 1
local has_syntax = hunk.lang and config.highlights.treesitter.enabled
local needs_vim = not hunk.lang and hunk.ft and config.highlights.vim.enabled
if has_syntax or needs_vim then
table.insert(deferred_syntax, hunk)
end
end
end
if #deferred_syntax > 0 then
local tick = entry.tick
vim.schedule(function()
if not vim.api.nvim_buf_is_valid(bufnr) then
return
end
local cur = hunk_cache[bufnr]
if not cur or cur.tick ~= tick then
return
end
local t1 = config.debug and vim.uv.hrtime() or nil
local full_opts = {
hide_prefix = config.hide_prefix,
highlights = config.highlights,
}
for _, hunk in ipairs(deferred_syntax) do
local start_row = hunk.start_line - 1
local end_row = start_row + #hunk.lines
if hunk.header_start_line then
start_row = hunk.header_start_line - 1
end
vim.api.nvim_buf_clear_namespace(bufnr, ns, start_row, end_row)
highlight.highlight_hunk(bufnr, ns, hunk, full_opts)
if not hunk.lang and hunk.ft then
highlight.highlight_hunk_vim_syntax(bufnr, ns, hunk, full_opts)
end
end
if t1 then
dbg('deferred pass: %d hunks in %.2fms', #deferred_syntax, (vim.uv.hrtime() - t1) / 1e6)
end
end)
end
if t0 and count > 0 then
dbg(
'on_win %d: %d hunks [%d..%d] in %.2fms (viewport %d-%d)',
bufnr,
count,
first,
last,
(vim.uv.hrtime() - t0) / 1e6,
toprow,
botrow
)
end
end,
})
@ -531,35 +700,13 @@ function M.attach(bufnr)
dbg('attaching to buffer %d', bufnr)
local debounced = create_debounced_highlight(bufnr)
highlight_buffer(bufnr)
vim.api.nvim_create_autocmd({ 'TextChanged', 'TextChangedI' }, {
buffer = bufnr,
callback = debounced,
})
vim.api.nvim_create_autocmd('Syntax', {
buffer = bufnr,
callback = function()
dbg('syntax event, re-highlighting buffer %d', bufnr)
highlight_buffer(bufnr)
end,
})
vim.api.nvim_create_autocmd('BufReadPost', {
buffer = bufnr,
callback = function()
dbg('BufReadPost event, re-highlighting buffer %d', bufnr)
highlight_buffer(bufnr)
end,
})
ensure_cache(bufnr)
vim.api.nvim_create_autocmd('BufWipeout', {
buffer = bufnr,
callback = function()
attached_buffers[bufnr] = nil
hunk_cache[bufnr] = nil
end,
})
end
@ -567,7 +714,7 @@ end
---@param bufnr? integer
function M.refresh(bufnr)
bufnr = bufnr or vim.api.nvim_get_current_buf()
highlight_buffer(bufnr)
invalidate_cache(bufnr)
end
local DIFF_WINHIGHLIGHT = table.concat({
@ -622,4 +769,11 @@ function M.get_conflict_config()
return config.conflict
end
M._test = {
find_visible_hunks = find_visible_hunks,
hunk_cache = hunk_cache,
ensure_cache = ensure_cache,
invalidate_cache = invalidate_cache,
}
return M