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5x the buffer size to fix(?) Chrome jank #95

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5x the buffer size to fix(?) Chrome jank #95

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27 changes: 14 additions & 13 deletions src/test_s2c_srv.c
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Original file line number Diff line number Diff line change
Expand Up @@ -473,26 +473,27 @@ int test_s2c(Connection *ctl, tcp_stat_agent *agent, TestOptions *testOptions,
buff[j] = (k++ & 0x7f);
}
if (testOptions->connection_flags & WEBSOCKET_SUPPORT) {
static int FAKE_BUFFSIZE = BUFFSIZE * 5;
// Make sure the data has a websocket header
((unsigned char*)buff)[0] = 0x82; // One frame of binary data
// Depending on BUFFSIZE, the websocket header will be 2, 4, or 10
// bytes big. This header is constructed to comply with RFC 6455.
if (BUFFSIZE < 126) {
buff[1] = (BUFFSIZE-2) & 0x7F;
} else if (BUFFSIZE < 65536) {
if (FAKE_BUFFSIZE < 126) {
buff[1] = (FAKE_BUFFSIZE-2) & 0x7F;
} else if (FAKE_BUFFSIZE < 65536) {
buff[1] = 126;
((unsigned char*)buff)[2] = ((BUFFSIZE - 4) >> 8) & 0xFF;
((unsigned char*)buff)[3] = (BUFFSIZE - 4) & 0xFF;
((unsigned char*)buff)[2] = ((FAKE_BUFFSIZE - 4) >> 8) & 0xFF;
((unsigned char*)buff)[3] = (FAKE_BUFFSIZE - 4) & 0xFF;
} else {
buff[1] = 127;
((unsigned char*)buff)[2] = (((long long)BUFFSIZE - 10) >> 56) & 0xFF;
((unsigned char*)buff)[3] = (((long long)BUFFSIZE - 10) >> 48) & 0xFF;
((unsigned char*)buff)[4] = (((long long)BUFFSIZE - 10) >> 40) & 0xFF;
((unsigned char*)buff)[5] = (((long long)BUFFSIZE - 10) >> 32) & 0xFF;
((unsigned char*)buff)[6] = (((long long)BUFFSIZE - 10) >> 24) & 0xFF;
((unsigned char*)buff)[7] = (((long long)BUFFSIZE - 10) >> 16) & 0xFF;
((unsigned char*)buff)[8] = (((long long)BUFFSIZE - 10) >> 8) & 0xFF;
((unsigned char*)buff)[9] = (BUFFSIZE - 10) & 0xFF;
((unsigned char*)buff)[2] = (((long long)FAKE_BUFFSIZE - 10) >> 56) & 0xFF;
((unsigned char*)buff)[3] = (((long long)FAKE_BUFFSIZE - 10) >> 48) & 0xFF;
((unsigned char*)buff)[4] = (((long long)FAKE_BUFFSIZE - 10) >> 40) & 0xFF;
((unsigned char*)buff)[5] = (((long long)FAKE_BUFFSIZE - 10) >> 32) & 0xFF;
((unsigned char*)buff)[6] = (((long long)FAKE_BUFFSIZE - 10) >> 24) & 0xFF;
((unsigned char*)buff)[7] = (((long long)FAKE_BUFFSIZE - 10) >> 16) & 0xFF;
((unsigned char*)buff)[8] = (((long long)FAKE_BUFFSIZE - 10) >> 8) & 0xFF;
((unsigned char*)buff)[9] = (FAKE_BUFFSIZE - 10) & 0xFF;
}
}

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