Lessons Learned: TCP slow start doesn’t have to be so slow

Posted by chetanahuja on Friday September 11, 2015 @02:46PM
from the packetzoom.com dept.

https://packetzoom.com/blog/lessons-learned-tcp-slow-start-doesnt-have-to-be-so-slow.html?repost

( 7 comments | 10 points | on HN )

Re:Lessons Learned: TCP slow start doesn’t have to be so slow by patkennard on Friday September 11, 2015 @03:05PM (#10205578)

Google must be working on something to fix slow start already, if not then I'm sure Hooli XYZ has something in the works!

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Re:Lessons Learned: TCP slow start doesn’t have to be so slow by chetanahuja on Friday September 11, 2015 @03:19PM (#10205648)

Well there's QUIC. But it seems like it's focused on replacing HTTP/SPDY/HTTP2 and not really interested in doing mobile specific optimizations. The OP blogpost is describing a technique involving taking account of specific properties of mobile networks to tune slow start for each individual connection.

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Re:Lessons Learned: TCP slow start doesn’t have to be so slow by rp248 on Friday September 11, 2015 @03:11PM (#10205601)

Does TCP's slow start affect each of my requests? i.e irrespective of the throughput it sees for a prior request?

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Re:Lessons Learned: TCP slow start doesn’t have to be so slow by chetanahuja on Friday September 11, 2015 @03:17PM (#10205637)

That entirely depends on what your client library (http client in most cases) decides to do and whether the server sides plays well with persistent connection. TCP protocol itself has no concept of "a request" really. It's just a streaming data protocol in both directions.

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Re:Lessons Learned: TCP slow start doesn’t have to be so slow by bexp on Friday September 11, 2015 @02:53PM (#10205493)

awesome explanation on how TCP slows everything down, I'm going to try this PacketZoom SDK mentioned in the article.

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Re:Lessons Learned: TCP slow start doesn’t have to be so slow by chetanahuja on Friday September 11, 2015 @03:05PM (#10205577)

This is a repost... didn't get enough love last week. Maybe if it was renamed SlowStartJS or something....

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Re:Lessons Learned: TCP slow start doesn’t have to be so slow by aavegmittal on Friday September 11, 2015 @03:08PM (#10205587)

JS and slow, thats redundant!

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