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add caching layer to teleport tube
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@ -4,6 +4,9 @@ local filename=minetest.get_worldpath() .. "/teleport_tubes"
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local tp_tube_db = nil -- nil forces a read
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local tp_tube_db_version = 2.0
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-- cached rceiver list: hash(pos) => {receivers}
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local cache = {}
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local function hash(pos)
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return string.format("%.30g", minetest.hash_node_position(pos))
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end
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@ -18,6 +21,8 @@ local function save_tube_db()
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else
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error(err)
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end
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-- reset tp-tube cache
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cache = {}
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end
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local function migrate_tube_db()
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@ -101,6 +106,12 @@ local function read_node_with_vm(pos)
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end
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local function get_receivers(pos, channel)
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local hash = minetest.hash_node_position(pos)
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if cache[hash] then
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-- re-use cached result
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return cache[hash]
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end
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local tubes = tp_tube_db or read_tube_db()
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local receivers = {}
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local dirty = false
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@ -121,6 +132,8 @@ local function get_receivers(pos, channel)
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if dirty then
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save_tube_db()
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end
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-- cache the result for next time
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cache[hash] = receivers
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return receivers
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end
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