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add caching layer to teleport tube

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This commit is contained in:
BuckarooBanzay 2021-03-18 07:51:10 +01:00
parent 01f4ea066c
commit 047718b3c3
1 changed files with 13 additions and 0 deletions
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13
teleport_tube.lua
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@ -4,6 +4,9 @@ local filename=minetest.get_worldpath() .. "/teleport_tubes"
local tp_tube_db = nil -- nil forces a read
local tp_tube_db_version = 2.0
-- cached rceiver list: hash(pos) => {receivers}
local cache = {}
local function hash(pos)
return string.format("%.30g", minetest.hash_node_position(pos))
end
@ -18,6 +21,8 @@ local function save_tube_db()
else
error(err)
end
-- reset tp-tube cache
cache = {}
end
local function migrate_tube_db()
@ -101,6 +106,12 @@ local function read_node_with_vm(pos)
end
local function get_receivers(pos, channel)
local hash = minetest.hash_node_position(pos)
if cache[hash] then
-- re-use cached result
return cache[hash]
end
local tubes = tp_tube_db or read_tube_db()
local receivers = {}
local dirty = false
@ -121,6 +132,8 @@ local function get_receivers(pos, channel)
if dirty then
save_tube_db()
end
-- cache the result for next time
cache[hash] = receivers
return receivers
end