Dart3 update (#10493)

* add logic for variable --define=MAX_ISOLATES

* add run.sh and optimize scaling logic in Dockerfile

* bump dart and dependencies version everywhere

Author: iapicca

frameworks/Dart/dart3/README.md

@@ -1,6 +1,6 @@
 # Dart 3 Benchmarking Test
 
-### Test Type Implementation Source Code
+## Test Type Implementation Source Code
 
 - [JSON](server.dart)
 - [PLAINTEXT](server.dart)
@@ -9,14 +9,14 @@
 
 The tests were run with:
 
-- [Dart v3.4.4](https://dart.dev/)
+- [Dart v3.10.7](https://dart.dev/)
 
 ## Test URLs
 
 ### JSON
 
-http://localhost:8080/json
+`http://localhost:8080/json`
 
 ### PLAINTEXT
 
-http://localhost:8080/plaintext
+`http://localhost:8080/plaintext`

frameworks/Dart/dart3/bin/server.dart

@@ -3,9 +3,17 @@ import 'dart:io';
 import 'dart:isolate';
 
 void main(List<String> args) async {
+  /// Isolate count per process, set at build-time via:
+  /// dart compile exe --define=MAX_ISOLATES=X
+  /// Defaults to machine core count for dynamic scaling.
+  final maxIsolates = int.fromEnvironment(
+    'MAX_ISOLATES',
+    defaultValue: Platform.numberOfProcessors,
+  );
+
   /// Create an [Isolate] containing an [HttpServer]
   /// for each processor after the first
-  for (var i = 1; i < Platform.numberOfProcessors; i++) {
+  for (var i = 1; i < maxIsolates; i++) {
     await Isolate.spawn(_startServer, args);
   }
 

frameworks/Dart/dart3/dart3.dockerfile

@@ -1,14 +1,26 @@
 
-FROM dart:3.8 AS builder
-
-COPY . /app
+FROM dart:3.10.7 AS builder
 WORKDIR /app
+
+# Define the build-time argument (Default to 8)
+ARG MAX_ISOLATES=8
+COPY . .
 RUN mkdir build
-RUN dart compile exe ./bin/server.dart -o build/server
+RUN dart compile exe bin/server.dart \
+    --define=MAX_ISOLATES=${MAX_ISOLATES} \
+    -o build/server
+
+FROM busybox:glibc
+
+# Re-declare ARG in the second stage to use it in ENV
+# Define the build-time argument (Default to 8)
+ARG MAX_ISOLATES=8
+ENV MAX_ISOLATES_PER_PROCESS=${MAX_ISOLATES}
 
-FROM scratch
 COPY --from=builder /runtime/ /
-COPY --from=builder /app/build /bin
+COPY --from=builder /app/build/server /bin/server
+COPY run.sh /bin/run.sh
+RUN chmod +x /bin/run.sh
 
 EXPOSE 8080
-CMD ["server"]
+CMD ["/bin/run.sh"]

frameworks/Dart/dart3/pubspec.yaml

@@ -1,7 +1,7 @@
 name: dartbenchmark
 description: A benchmark of dart
 environment:
-  sdk: ^3.8.0
+  sdk: ^3.10.7
 
 dev_dependencies:
-  lints: ^4.0.0
+  lints: ^6.0.0

frameworks/Dart/dart3/run.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+# Detect CPU threads from the system
+TOTAL_CORES=$(grep -c ^processor /proc/cpuinfo)
+
+# This comes from the ENV in the Dockerfile
+MAX_ISO=${MAX_ISOLATES_PER_PROCESS}
+
+# Calculate OS processes needed
+NUM_WORKERS=$((TOTAL_CORES / MAX_ISO))
+if [ "$NUM_WORKERS" -le 0 ]; then NUM_WORKERS=1; fi
+
+echo "Scaling: $TOTAL_CORES cores / $MAX_ISO isolates = $NUM_WORKERS processes"
+
+for i in $(seq 1 $NUM_WORKERS); do
+  /bin/server & 
+done
+
+wait