commit 4812b9a8b6c0b1798b7980d0a7f04d25dae4b396 Author: David Fifield <david@bamsoftware.com> Date: Thu Dec 25 21:33:41 2014 -0800 Reduce meek-client sessionIdLength to 8 from 32, and strip trailing '='. This reduces the encoded length of a session ID from 44 bytes down to 12. If we have 1000 simultaneous users, and they're all idle and polling at 5 requests/s, then this change saves 1000*(44-12)/5 = 6.4 KB/s. According to https://trac.torproject.org/projects/tor/ticket/12778, the header length is about 413 bytes, so the shorter session ID saves about 7% in the header. --- meek-client/meek-client.go | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/meek-client/meek-client.go b/meek-client/meek-client.go index 862f154..c02c784 100644 --- a/meek-client/meek-client.go +++ b/meek-client/meek-client.go @@ -42,6 +42,7 @@ import ( "net/url" "os" "os/signal" + "strings" "syscall" "time" ) @@ -54,7 +55,7 @@ const ( // long-lived session. We split a TCP stream across multiple HTTP // requests, and those with the same session ID belong to the same // stream. - sessionIdLength = 32 + sessionIdLength = 8 // The size of the largest chunk of data we will read from the SOCKS // port before forwarding it in a request, and the maximum size of a // body we are willing to handle in a reply. @@ -249,7 +250,7 @@ func genSessionId() string { if err != nil { panic(err.Error()) } - return base64.StdEncoding.EncodeToString(buf) + return strings.TrimRight(base64.StdEncoding.EncodeToString(buf), "=") } // Callback for new SOCKS requests.