【性能调优】大表分帧处理：pairs遍历的切片与续扫

local cursor = nil
local function sliceWalk(bigTable)
    local n = 0
    local t0 = os.clock()
    for k, v in pairs(bigTable) do
        cursor = k
        n = n + 1
        if (os.clock() - t0) * 1000 > 8 or n >= 200 then
            return false
        end
    end
    return true
end

setontimerex(71, 1)
local done = false
function ontimer71()
    if done then return end
    done = sliceWalk(warStat)
    if done then
        cursor = nil
        sendcentermsg("沙巴克战况统计完成")
        settleRank()
    end
end