Add StreamMap class for efficient stream-based mapping

[Bue-von-hon]

Motivation:

• Need a data structure that efficiently handles stream-based key-value mappings
• Require a solution that can manage sequential data with integer-based indexing
• Want to leverage the existing ArrayRingBuffer implementation for optimal memory usage

Modifications:

• Add(StreamMap): Added core operations: put(), get(), size(), and remove(). Integrated ArrayRingBuffer as the underlying data structure
• Add(ArrayRingBuffer): Fork from https://gist.github.com/franz1981/6277af990ccfe0a5da8542a75d66ce5e

Result:

• Enables sequential access to stored values using integer keys
• Maintains O(1) time complexity for basic operations

[Bue-von-hon]

@normanmaurer @tsegismont
I will add the benchmark results when time permits.
In the meantime, I would appreciate if you could review the newly implemented streamMap class.

DefaultHttp2Connection class currently uses IntObjectMap to implement streamMap, which contains Http2Stream objects. Each Http2Stream maintains its state and stream ID.

The streamMap is used in 8 different locations in the code:

• Adding streams: streamMap.put(stream.id(), stream)
• Iterating entries: Iterator<PrimitiveEntry> itr = streamMap.entries().iterator()
• Retrieving streams: streamMap.get(streamId)
• Checking size: streamMap.size() == 1
• Removing streams: removed = streamMap.remove(stream.id()) != null

I have implemented a new streamMap class that maintains the same functionality and interface as the original implementation.

[Bue-von-hon]

Future: HTTP/2 pipelined tests. This would likely be a variant of one of the present-day simple tests (JSON Serialization or Plaintext or both), since the presumed intent of such a test would be to measure the overhead impact/benefit of switching from HTTP v1 to v2.
link

@normanmaurer @tsegismont @franz1981 Hello.
I wanted to conduct HTTP/2 benchmarking, but TechEmpower benchmarks don't support HTTP/2. What would be the best approach?

[He-Pin]

@Bue-von-hon How about go with gathing?

[Bue-von-hon]

@Bue-von-hon How about go with gathing?

Oh... I will try it. 👍

[chrisvest]

This is the QUIC repo, but if you only want to benchmark HTTP/2, we have some microbenchmarks in the main netty repo: https://github.com/netty/netty/tree/4.1/microbench/src/main/java/io/netty/handler/codec/http2