performance.setResourceTimingBufferSize(maxSize)
将全局性能资源计时缓冲区大小设置为指定数量的"resource"类型性能条目对象。
默认情况下,最大缓冲区大小设置为 250。
Sets the global performance resource timing buffer size to the specified number of "resource" type performance entry objects.
By default the max buffer size is set to 250.