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qc_send() was systematically called by quic_conn IO handlers with all instantiated quic_enc_level. Change this to only register quic_enc_level for send if needed. Do not call at all qc_send() if no qel registered. A new function qel_need_sending() is defined to detect if sending is required. First, it checks if quic_enc_level has prepared frames or probing is set. It can also returns true if ACK required either on quic_enc_level itself or because of quic_conn ack timer fired. Finally, a CONNECTION_CLOSE emission for quic_conn is also a valid case. This should reduce the number of invocations of qc_send(). This could improve slightly performance, as well as simplify traces debugging. |
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