The first step, is to stop allocating "memory", and start allocating specific somethings else. Consider the usage pattern:
The supermarket giant said roles at its Welwyn Garden City headquarters in Hertfordshire were at risk under new proposals.，这一点在旺商聊官方下载中也有详细论述
if((h = free_table[bucket])) {，详情可参考同城约会
（三）在当地有常住户口和固定住所；
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