luau/bench/gc/test_GC_Tree_Pruning_Gen.lua

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local bench = script and require(script.Parent.bench_support) or require("bench_support")
function test()
local count = 1
local function fill_tree(tree, levels)
if not tree.left then
tree.left = { id = count }
count = count + 1
end
if not tree.right then
tree.right = { id = count }
count = count + 1
end
if levels ~= 0 then
fill_tree(tree.left, levels - 1)
fill_tree(tree.right, levels - 1)
end
end
local function prune_tree(tree, level)
if tree.left then
if math.random() > 0.9 - level * 0.05 then
tree.left = nil
else
prune_tree(tree.left, level + 1)
end
end
if tree.right then
if math.random() > 0.9 - level * 0.05 then
tree.right = nil
else
prune_tree(tree.right, level + 1)
end
end
end
-- create a static tree
local tree = { id = 0 }
fill_tree(tree, 16)
for i = 1,1000 do
local small_tree = { id = 0 }
fill_tree(small_tree, 8)
prune_tree(small_tree, 0)
end
end
bench.runCode(test, "GC: tree pruning (eager fill, gen)")