The first step, is to stop allocating "memory", and start allocating specific somethings else. Consider the usage pattern:
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，这一点在同城约会中也有详细论述
if (offset = totalBytes) {
The maximum distance for a Wi-Fi extender varies depending on the model, but most can effectively extend your wireless signal between 800 and 2,500 square feet. Some high-end models may reach even farther, especially if they feature external antennas or are part of a mesh system with additional dedicated wireless access points.