【性能调优】table池化复用：用对象池压低GC停顿的实践

local pool, used = {}, 0
local POOL_MAX = 500
local function acquire()
    local n = #pool
    if n > 0 then
        local t = pool[n]
        pool[n] = nil
        return t
    end
    return { dmg = 0, name = "", time = 0 }
end
local function release(t)
    t.dmg, t.name, t.time = 0, "", 0
    if #pool < POOL_MAX then
        pool[#pool + 1] = t
    end
end

local function onHit(name, dmg)
    local rec = acquire()
    rec.name, rec.dmg, rec.time = name, dmg, os.time()
    pushLedger(rec)
end
local function settle()
    for i = 1, #ledger do
        release(ledger[i])
        ledger[i] = nil
    end
end