Matteo Collina 1576cb83b4 http2: increase default window sizes ...

Increase the default HTTP/2 stream window from 64KB (65535) to 4MB
(4194304) and the default local connection window to 32MB (33554432).

The default 64KB window limits throughput on high-latency connections
to window_size / RTT. With a 250ms RTT, throughput is limited to
256KB/s. The new defaults improve throughput to 16MB/s (128Mbps)
for the stream window and 128MB/s (1Gbps) for the connection window.

Fixes: https://github.com/nodejs/node/issues/38426
Signed-off-by: Matteo Collina <hello@matteocollina.com>
PR-URL: https://github.com/nodejs/node/pull/64623
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gürgün Dayıoğlu <hey@gurgun.day>
Reviewed-By: Ethan Arrowood <ethan@arrowood.dev>
Reviewed-By: Aviv Keller <me@aviv.sh>
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

2026-08-04 14:01:33 +00:00

..

sequential.status

test: unmark flaky http2-large-file for Win

2026-07-09 11:24:20 +00:00

test-async-wrap-getasyncid.js

src,lib: implement experimental DTLS API

2026-05-21 14:13:04 -07:00

test-buffer-creation-regression.js

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test-child-process-emfile.js

test: add escapePOSIXShell util

2024-09-29 20:44:52 +00:00

test-child-process-execsync.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-child-process-exit.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-child-process-pass-fd.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-cli-syntax-bad.js

test: add escapePOSIXShell util

2024-09-29 20:44:52 +00:00

test-cli-syntax-file-not-found.js

test: add escapePOSIXShell util

2024-09-29 20:44:52 +00:00

test-cli-syntax-good.js

test: add escapePOSIXShell util

2024-09-29 20:44:52 +00:00

test-cli-syntax-require.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cluster-inspect-brk.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cluster-net-listen-ipv6only-none.js

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test-cluster-net-listen-ipv6only-rr.js

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test-cluster-port-reuse-between-workers.js

cluster: fix port reuse between cluster

2026-01-14 10:39:15 +00:00

test-cluster-send-handle-large-payload.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-cpu-prof-default.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cpu-prof-dir-absolute.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cpu-prof-dir-and-name.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cpu-prof-dir-relative.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cpu-prof-dir-worker.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cpu-prof-drained.js

tools: enforce trailing commas in test/sequential

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test-cpu-prof-exit.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cpu-prof-invalid-options.js

tools: enforce trailing commas in test/sequential

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test-cpu-prof-kill.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cpu-prof-name.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-cpu-prof-worker-argv.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-crypto-timing-safe-equal-fast.js

crypto: fix argument validation in crypto.timingSafeEqual fast path

2025-11-03 22:18:51 +00:00

test-crypto-timing-safe-equal.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-debug-prompt.js

test: unflake debugger and REPL tests

2026-08-03 12:49:21 +00:00

test-debugger-custom-port.js

test: update startCLI to set --port=0 by default

2025-07-20 17:37:28 +00:00

test-debugger-debug-brk.js

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test-debugger-invalid-args.js

test: update startCLI to set --port=0 by default

2025-07-20 17:37:28 +00:00

test-debugger-launch.mjs

test: forbid use of named imports for fixtures

2026-01-01 23:48:26 +00:00

test-debugger-pid.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-deprecation-flags.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-dgram-bind-shared-ports.js

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test-dgram-implicit-bind-failure.js

dgram: skip dns.lookup() for literal IP addresses

2026-06-30 13:07:49 +00:00

test-dgram-pingpong.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-diagnostic-dir-cpu-prof.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-diagnostic-dir-heap-prof.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-dtls-interop-openssl-client.mjs

net: improve dtls cert verification

2026-08-01 06:15:08 +00:00

test-dtls-interop-openssl-server.mjs

src,lib: add dtls interop tests

2026-05-21 14:13:07 -07:00

test-error-serdes.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-fs-opendir-recursive.js

test: ensure assertions are reached on more tests

2025-11-11 09:56:18 +00:00

test-fs-readdir-recursive.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-fs-stat-sync-overflow.js

test: use spawn and spawnPromisified instead of exec

2023-08-05 07:29:53 +00:00

test-fs-watch.js

test: rely less on duplicative common test harness utilities

2025-01-25 07:23:09 +00:00

test-gc-http-client-onerror.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-gc-http-client-timeout.js

tools: enforce trailing commas in test/sequential

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test-gc-http-client.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-get-heapsnapshot-options.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-heapdump-flag-custom-dir.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-heapdump-flag.js

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test-heapdump.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-http2-large-file.js

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test-http2-max-session-memory.js

http2: increase default window sizes

2026-08-04 14:01:33 +00:00

test-http2-ping-flood.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-http2-settings-flood.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-http2-timeout-large-write-file.js

http2: increase default window sizes

2026-08-04 14:01:33 +00:00

test-http2-timeout-large-write.js

http2: increase default window sizes

2026-08-04 14:01:33 +00:00

test-http-econnrefused.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-http-keep-alive-large-write.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-http-keepalive-maxsockets.js

http: runtime deprecate instantiating without new

2026-08-01 21:42:59 +00:00

test-http-regr-gh-2928.js

test: reduce the number of requests and parsers

2023-10-20 12:56:44 +00:00

test-http-server-keep-alive-timeout-slow-client-headers.js

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test-http-server-keep-alive-timeout-slow-server.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-http-server-request-timeouts-mixed.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-https-connect-localport.js

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test-https-server-keep-alive-timeout.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-init.js

test: rely less on duplicative common test harness utilities

2025-01-25 07:23:09 +00:00

test-inspector-network-resource.js

test: make test-inspector-network-resource sequential

2025-07-28 13:29:23 +00:00

test-inspector-open-dispose.mjs

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-inspector-port-cluster.js

test: enforce better never-settling-promise detection

2025-12-10 23:55:36 +00:00

test-module-loading.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-net-better-error-messages-port.js

net: enable autoSelectFamily by default

2023-04-05 08:31:56 -07:00

test-net-connect-econnrefused.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-net-connect-handle-econnrefused.js

net: remove redundant connecting assignment

2022-07-09 17:10:16 +01:00

test-net-connect-local-error.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-net-GH-5504.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-net-listen-shared-ports.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-net-localport.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-net-reconnect-error.js

net: enable autoSelectFamily by default

2023-04-05 08:31:56 -07:00

test-net-response-size.js

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test-net-server-address.js

dns: accept 'IPv4' and 'IPv6' for family

2022-06-15 18:02:01 -04:00

test-net-server-bind.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-net-server-listen-ipv6-link-local.js

test: use valid hostnames

2024-08-25 22:16:25 +00:00

test-next-tick-error-spin.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-perf-hooks.js

test: fix incorrect calculation in test-perf-hooks.js

2025-10-18 12:21:44 +00:00

test-performance-eventloopdelay.js

perf_hooks: sample delay per event loop iteration

2026-06-24 23:50:06 +00:00

test-pipe.js

http: runtime deprecate instantiating without new

2026-08-01 21:42:59 +00:00

test-process-title.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-process-warnings.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-repl-timeout-throw.js

repl: use inspector over vm

2026-07-18 12:59:37 -07:00

test-require-cache-without-stat.js

test: forbid use of named imports for fixtures

2026-01-01 23:48:26 +00:00

test-resolution-inspect-brk.js

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test-runner-run-inspect.mjs

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-stream2-fs.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-stream2-stderr-sync.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-timers-block-eventloop.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-timers-set-interval-excludes-callback-duration.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-tls-connect.js

test: update tls/crypto behaviour expectations when using BoringSSL

2026-05-08 19:27:18 +00:00

test-tls-lookup.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-tls-psk-client.js

test: update tls/crypto behaviour expectations when using BoringSSL

2026-05-08 19:27:18 +00:00

test-tls-session-timeout.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-util-debug.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-vm-break-on-sigint.js

test: move test-vm-break-on-sigint to sequential

2022-08-07 12:26:59 +00:00

test-vm-timeout-escape-promise-module-2.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-vm-timeout-rethrow.js

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test-watch-mode-inspect.mjs

test: fix flaky test-watch-mode-inspect timeout

2026-05-18 17:45:55 +00:00

test-watch-mode-restart-esm-loading-error.mjs

watch: print name of changed file that triggers restart

2026-06-22 05:55:19 +00:00

test-watch-mode-watch-flags.mjs

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-watch-mode-worker.mjs

watch: print name of changed file that triggers restart

2026-06-22 05:55:19 +00:00

test-watch-mode.mjs

watch: print name of changed file that triggers restart

2026-06-22 05:55:19 +00:00

test-without-async-context-frame.mjs

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-worker-eventlooputil.js

test: ensure assertions are reachable in test/sequential

2025-10-29 16:29:39 +01:00

test-worker-fshandles-error-on-termination.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-worker-fshandles-open-close-on-termination.js

test: move tests with many workers to sequential

2022-08-07 12:44:33 +00:00

test-worker-heapsnapshot-options.js

lib: add options to the heap snapshot APIs

2022-11-08 16:19:54 +01:00

test-worker-prof.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-write-heapsnapshot-options.js

tools: enforce trailing commas in test/sequential

2025-12-03 14:17:37 +01:00

test-zlib-crc32-fast-api.js

zlib: implement fast path for crc32

2025-09-14 00:39:58 +00:00

testcfg.py

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