TLS 1.3 also has speed improvements.When 'handshake' exchange, the necessary exchange cycles between the browser and the server are limited, meaning that the connection using TLS 1.3 protocol will usually be completed in one exchange, even It is even earlier when using some applications, making the whole process faster.The new version is less resource-intensive, meaning less CPU usage.
Mozilla has announced support for TLS 1.3 in Firefox, Google also supports draft on Chrome 65. Facebook says that more than 50% of their traffic is secured with TLS 1.3
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