将 Node.js 添加到 PATH：
Testing told me I used ~3,500 bytes for each frame - at 10 FPS, that’s ~35 KB/sec. While a nice T1 line could handle that, it’d easily saturate a 56k modem. And supporting even 1,000 clients would mean pushing 35 megabytes a second - way too much!。服务器推荐对此有专业解读
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Andrew can also tuck his mouse and keybord out of the way