This project holds experiences in the Elixir TCP world. They all have a few corresponding blog entries and also a git branch. The git branches are then merged into master too:
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01_request_reply branch is documented here. This is a very basic TCP Request/Reply client and server example. The C++ client is here. The Elixir server is here. The result is 22k msgs/sec on my laptop.
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02_throttled_acks branch is documented here. This is an attempt to improve performance by changing the messaging pattern that allows combining and delaying ACK messages. The C++ client is here. The Elixir server is here. The result is 90k msgs/sec on my laptop.
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03_head_rest_pattern branch is documented here. By better using the Elixir pattern matching on binariy messages I had 2x performance gain. The C++ client is here. The Elixir server is here. The result is 250k msgs/sec on my laptop.
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04_synch_ack branch is documented here. By removing a bottleneck from the code I achieved significant performance gain. The C++ client is here. The Elixir server is here. The result is over 2M msgs/sec on my laptop.
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05_asynch_ack branch is documented here. In this latest experiment I retried moving the ACK sending to and independent process. With that I achieved 3M request per sec on my MacBook Air laptop. When I tried it on an old Linux machine and an EC2 Amazon instance, this last code was slower than the previous 04_synch_ack experiment. Looks like at this performance range one needs to consider the actual hardware too where the code is going to run. Memory and CPU speed both impacts heavily the speed of passing data between Elixir processes. The client code is available here. The Elixir server is here.
Copyright (c) 2015 David Beck
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