cardigan: add 8gbit

frameworks/cardigan/meta.json

@@ -11,6 +11,7 @@
     "latency-1m", "latency-10k",
     "pipelined",
     "limited-conn",
+    "8gbit",
     "json-tls",
     "baseline-h2",
     "static-h2",

frameworks/cardigan/src/main/java/dev/cardigan/httparena/HttpArenaController.java

@@ -11,6 +11,7 @@
 import java.lang.foreign.Arena;
 import java.lang.foreign.MemorySegment;
 import java.lang.foreign.ValueLayout;
+import java.util.Arrays;
 
 /** The small arithmetic endpoints shared by the HttpArena transports. */
 public final class HttpArenaController {
@@ -46,6 +47,48 @@ public Response baseline2(
         return Response.text((long) a + b);
     }
 
+    @Post("/echo")
+    public Response echo(RequestBody body) {
+        return Response.bytes(
+            "application/octet-stream",
+            readBody(body));
+    }
+
+    private static byte[] readBody(RequestBody body) {
+        long declaredLength = body.length();
+        if (declaredLength > Integer.MAX_VALUE) {
+            throw new IllegalArgumentException("echo body is too large");
+        }
+
+        int initialCapacity = declaredLength >= 0
+            ? (int) declaredLength
+            : 16 * 1024;
+        byte[] bytes = new byte[initialCapacity];
+        int length = 0;
+        while (declaredLength < 0 || length < initialCapacity) {
+            if (length == bytes.length) {
+                int nextCapacity = Math.max(1, bytes.length << 1);
+                if (nextCapacity <= bytes.length) {
+                    throw new IllegalArgumentException("echo body is too large");
+                }
+                bytes = Arrays.copyOf(bytes, nextCapacity);
+            }
+            int read = body.read(
+                MemorySegment.ofArray(bytes).asSlice(
+                    length, bytes.length - length));
+            if (read < 0) {
+                break;
+            }
+            length += read;
+        }
+
+        if (declaredLength >= 0 && length != initialCapacity) {
+            throw new IllegalArgumentException(
+                "echo body ended before its declared length");
+        }
+        return length == bytes.length ? bytes : Arrays.copyOf(bytes, length);
+    }
+
     private static long readLong(RequestBody body, MemorySegment scratch) {
         long value = 0;
         boolean negative = false;

site/data/results/cardigan.json

@@ -1,6 +1,31 @@
 {
   "framework": "cardigan",
   "results": {
+    "8gbit-512": {
+      "framework": "cardigan",
+      "language": "Java",
+      "rps": 49382,
+      "avg_latency": "115.1us",
+      "p99_latency": "622.0us",
+      "cpu": "289.3%",
+      "memory": "1.0GiB",
+      "connections": 512,
+      "threads": 64,
+      "duration": "5s",
+      "pipeline": 1,
+      "bandwidth": "509.72MB/s",
+      "input_bw": "482.25MB/s",
+      "reconnects": 0,
+      "status_2xx": 246990,
+      "status_3xx": 0,
+      "status_4xx": 0,
+      "status_5xx": 0,
+      "cpu_usec": 14999296,
+      "cpu_per_req_us": 60.7284,
+      "target_rate": 50000,
+      "rate_ratio": 0.9876,
+      "p99_9_latency": "4658.0us"
+    },
     "baseline-4096": {
       "framework": "cardigan",
       "language": "Java",