Add virtual-threads-benchmark-webflux: the WebFlux leg of the three-way benchmark

Fixes two bugs found during self-correction before publishing:
- /stream used Flux.interval(), which ticks on its own wall-clock schedule
  independent of downstream demand and threw OverflowException under a slow
  subscriber; switched to Flux.range(), which has no independent production
  schedule and can never outrun demand.
- The event-loop-starvation test's first cut used only 8 concurrent /cpu
  requests as background load, which drained through the 4 event-loop
  threads well inside the /io measurement window and produced an
  inconsistent, sometimes-inverted result across runs; raised to 60
  concurrent requests (matching the CPU-bound benchmark's own concurrency)
  so the load actually occupies the event loop for the full window.

Also adds StreamBackpressureTest, a StepVerifier proof that the /stream
endpoint never emits ahead of its subscriber's outstanding requests.

This commit is contained in:

Claude

2026-09-19 08:48:58 +00:00

parent f506b01389

commit b331db6638

19 changed files with 863 additions and 0 deletions

									
										virtual-threads-benchmark-webflux/scripts/run.sh
									
Executable

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				#!/usr/bin/env bash

				# Starts the WebFlux app on :8080 to poke at by hand.

				#   ./scripts/run.sh

				set -euo pipefail

				cd "$(dirname "$0")/.."

				mvn -q -B spring-boot:run