Dr. Christian Geuer-Pollmann chgeuer
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marcelog
/ generic_proxy.erl
Last active
October 1, 2023 16:15
Quick and small tcp proxy written in erlang. Opens a socket and listens for incoming connections. For every new incoming connection, it will open a connection to the proxied host, and send whatever it gets from either side to the other.
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| -module(generic_proxy). | |
| -export([run/0]). | |
| -define(PORT_FROM, 63790). | |
| -define(PORT_TO, 6379). | |
| -define(BACKLOG, 10000). | |
| run() -> | |
| {ok, Socket} = gen_tcp:listen(0, [ |
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| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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