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Improve download speed #79

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7 changes: 5 additions & 2 deletions src/stream/tcb.rs
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Expand Up @@ -2,8 +2,11 @@ use super::seqnum::SeqNum;
use etherparse::TcpHeader;
use std::collections::BTreeMap;

const MAX_UNACK: u32 = 1024 * 16; // 16KB
const READ_BUFFER_SIZE: usize = 1024 * 16; // 16KB
// Increase the default in-flight and receive buffer sizes to support high-throughput links.
// These were previously 16KB which can severely limit upload throughput (throughput ~= window / RTT).
// Make them 1MiB by default so the stack can utilize higher bandwidth-delay products.
const MAX_UNACK: u32 = 1024 * 1024; // 1MiB
const READ_BUFFER_SIZE: usize = 1024 * 1024; // 1MiB
const MAX_COUNT_FOR_DUP_ACK: usize = 3; // Maximum number of duplicate ACKs before retransmission

/// Retransmission timeout
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