curl/docs/cmdline-opts/false-start.md

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c: Copyright (C) Daniel Stenberg, daniel@haxx.se, et al. SPDX-License-Identifier: curl Long: false-start Help: Enable TLS False Start Protocols: TLS Added: 7.42.0 Category: tls Multi: boolean See-also:

• tcp-fastopen Example:
• --false-start $URL ---

--false-start

Use false start during the TLS handshake. False start is a mode where a TLS client starts sending application data before verifying the server's Finished message, thus saving a round trip when performing a full handshake.

This functionality is currently only implemented in the Secure Transport (on iOS 7.0 or later, or OS X 10.9 or later) backend.