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By default the buffer has 16 bytes overhead

Reference: ESP32Async/ESPAsyncWebServer#316 (comment)

By default the buffer has 16 bytes overhead
@vortigont
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Nice! I'll give it a try.
Maybe setting it as formula would be clear so to understand the dependency and do not miss the change next time?

CONFIG_LWIP_TCP_SND_BUF_DEFAULT= CONFIG_LWIP_TCP_MSS * 4

@Jason2866
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@vortigont afaik this is not possible in a sdkconfig

@vortigont
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thanks, it works great both with hybrid compilation and with rebuilded core libs!

@me-no-dev me-no-dev merged commit 5236148 into master Oct 27, 2025
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@me-no-dev me-no-dev deleted the feat/tcp_buf_mss_div branch October 27, 2025 11:53
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4 participants