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Cache: Rewrite based on lua-lru

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Ought to be faster than our naive array-based approach.
Especially for the glyph cache, which has a solid amount of elements,
and is mostly cache hits.
(There are few things worse for performance in Lua than
table.remove @ !tail and table.insert @ !tail, which this was full of :/).

DocCache: New module that's now an actual Cache instance instead of a
weird hack. Replaces "Cache" (the instance) as used across Document &
co.
Only Cache instance with on-disk persistence.

ImageCache: Update to new Cache.

GlyphCache: Update to new Cache.
Also, actually free glyph bbs on eviction.
This commit is contained in:
NiLuJe
2021-05-04 23:13:24 +02:00
parent ce624be8b8
commit 21b067792d
15 changed files with 243 additions and 229 deletions
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10
frontend/document/pdfdocument.lua
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@@ -1,6 +1,6 @@
local Cache = require("cache")
local CacheItem = require("cacheitem")
local CanvasContext = require("document/canvascontext")
local DocCache = require("document/doccache")
local DocSettings = require("docsettings")
local Document = require("document/document")
local DrawContext = require("ffi/drawcontext")
@@ -139,7 +139,7 @@ end
function PdfDocument:getUsedBBox(pageno)
local hash = "pgubbox|"..self.file.."|"..self.reflowable_font_size.."|"..pageno
local cached = Cache:check(hash)
local cached = DocCache:check(hash)
if cached then
return cached.ubbox
end
@@ -152,7 +152,7 @@ function PdfDocument:getUsedBBox(pageno)
if used.x1 > pwidth then used.x1 = pwidth end
if used.y0 < 0 then used.y0 = 0 end
if used.y1 > pheight then used.y1 = pheight end
Cache:insert(hash, CacheItem:new{
DocCache:insert(hash, CacheItem:new{
ubbox = used,
size = 256, -- might be closer to 160
})
@@ -162,13 +162,13 @@ end
function PdfDocument:getPageLinks(pageno)
local hash = "pglinks|"..self.file.."|"..self.reflowable_font_size.."|"..pageno
local cached = Cache:check(hash)
local cached = DocCache:check(hash)
if cached then
return cached.links
end
local page = self._document:openPage(pageno)
local links = page:getPageLinks()
Cache:insert(hash, CacheItem:new{
DocCache:insert(hash, CacheItem:new{
links = links,
size = 64 + (8 * 32 * #links),
})