Streams
Preview — Ranvier is pre-release; its APIs may change.
CI instruction counts
The Library comparison tab compares retired instructions per operation across engines for the latest CI measurement; the Trends tab follows each scenario across commits. The tab last chosen opens on every benchmark page, and the runtime and metric carry over between tabs. Choose a runtime, metric or recorded commit, filter scenarios by name, and toggle libraries in the legend.
The trend panels follow each scenario across every recorded commit, one panel per Ranvier variant. By default each line shows its change since its first record; libraries other than Ranvier are pinned versions, so their lines mark the run-to-run noise floor. A change since the first record of 5 % or more is set in bold. The Metric control switches between instructions, cycles, allocated bytes, branch misses and CPU time on x64. The shaded band spans the lowest and highest of the five processes behind each median, and a ▲ under the axis marks a commit at which the Ranvier variant’s library counters changed; the readout lists those counters.
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A stream folds items from a long-running source into a value the graph reads. These scenarios measure Ranvier alone, on .NET and Node.js, and compare a stream with the nearest construction from other Ranvier primitives. Each variant is its own line. See Benchmarks for configuration, environment and caveats, and Instruction counts for the counter methodology.
stream-burst
stream-burst-1, stream-burst-16 and stream-burst-256 deliver 1, 16 or 256 items per round. A memo reads the delivered value and an effect reads the memo.
| Variant | One round |
|---|---|
Ranvier (stream, batched) | Delivers the items to a createStreamFold that sums them, inside one Batch. |
Ranvier (AsyncSource, batched) | Settles an AsyncSource with each running total, inside one Batch. |
Ranvier (AsyncSource, unbatched) | Settles an AsyncSource with each running total, one settle per item. |
The batched variants publish once per round; the unbatched variant publishes once per item.
stream-restart
Each operation writes a signal read by the node's start, which restarts the node. An effect reads the node.
| Variant | One operation |
|---|---|
Ranvier (stream) | Restarts a createStream, then delivers one item to the new run. |
Ranvier (async memo, CancelPrevious) | Restarts an async memo whose flights stay open, cancelling the previous flight. |