# We add cowsay
One major limitation of malloc (and even the best implementations like jemalloc and dlmalloc) is that they try to use a single allocator for each data structure. This is a mistake: A huge performance gain can be had by using
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// 易错点5：必须将当前元素入栈（作为左侧元素的候选更大值，漏写则栈始终为空）