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roadrunner: serve the async delay and short-lived WebSocket profiles #1411

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roadrunner: serve the async delay and short-lived WebSocket profiles #1411

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5550361
roadrunner: serve the async delay and short-lived WebSocket profiles
williamthome Aug 30, 2026
ed65186
Benchmark results: roadrunner [skip ci]
github-actions[bot] Aug 31, 2026
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4 changes: 3 additions & 1 deletion frameworks/roadrunner/meta.json
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
"json-comp",
"json-tls",
"8gbit",
"async",
"async-db",
"static-tls",
"fortunes",
Expand All @@ -30,7 +31,8 @@
"baseline-h3",
"static-h3",
"echo-ws",
"echo-ws-pipeline"
"echo-ws-pipeline",
"echo-ws-limited"
],
"maintainers": ["williamthome"]
}
4 changes: 4 additions & 0 deletions frameworks/roadrunner/src/roadrunner_httparena_app.erl
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Expand Up @@ -21,6 +21,10 @@ start(_StartType, _StartArgs) ->
%% connection-churn profiles.
max_clients => 65536,
num_acceptors => 100,
%% The async profile opens 32K connections at once; deepen the
%% kernel accept queue past the storm size (the kernel clamps
%% this to `net.core.somaxconn`), like the h2c listener below.
socket_backlog => 32768,
%% WebSocket sessions inherit the listener's 64 KB socket buffer,
%% held live per socket; the echo profiles exchange small text
%% frames, so shrink it per roadrunner's ws.recv_buffer production
Expand Down
12 changes: 12 additions & 0 deletions frameworks/roadrunner/src/roadrunner_httparena_handler.erl
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Expand Up @@ -11,6 +11,7 @@ routes() ->
{~"/baseline11", ?MODULE, undefined},
{~"/baseline2", ?MODULE, undefined},
{~"/pipeline", ?MODULE, undefined},
{~"/delay/:ms", ?MODULE, undefined},
#{path => ~"/json/:count", handler => ?MODULE, middlewares => [roadrunner_compress]},
{~"/echo", ?MODULE, undefined},
{~"/async-db", ?MODULE, undefined},
Expand Down Expand Up @@ -42,6 +43,8 @@ handle_route(~"/baseline2", Req) ->
baseline(Req);
handle_route(~"/pipeline", Req) ->
{roadrunner_resp:text(200, ~"ok"), Req};
handle_route(<<"/delay/", _/binary>>, Req) ->
delay_endpoint(Req);
handle_route(<<"/json/", _/binary>>, Req) ->
json_endpoint(Req);
handle_route(~"/echo", Req) ->
Expand Down Expand Up @@ -159,6 +162,15 @@ baseline(Req) ->
end,
{roadrunner_resp:text(200, integer_to_binary(A + B + BodyN)), Req2}.

%% Async-delay endpoint: read the per-request delay from the path, wait
%% idiomatically (each pending request is its own lightweight process,
%% so the wait suspends only this connection), and answer the parsed
%% number as the body.
delay_endpoint(Req) ->
#{~"ms" := MsBin} = roadrunner_req:bindings(Req),
ok = timer:sleep(binary_to_integer(MsBin)),
{roadrunner_resp:text(200, MsBin), Req}.

json_endpoint(Req) ->
Count = binding_int(~"count", Req, 0),
M = qs_int(~"m", Req, 1),
Expand Down
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