feat(benchmarks): add JMH benchmarks for performance testing and load scripts

load-tests/run-tests.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR"
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# Default values
+TEST_TYPE="${1:-ramp-up}"
+BASE_URL="${BASE_URL:-http://localhost:8080}"
+OUTPUT_FILE="${2:-results-$(date +%s).csv}"
+
+echo -e "${BLUE}NowChess Load Test Runner${NC}"
+echo "Test Type: $TEST_TYPE"
+echo "Base URL: $BASE_URL"
+echo ""
+
+# Check if k6 is installed
+if ! command -v k6 &> /dev/null; then
+    echo -e "${RED}Error: k6 not found. Install from https://k6.io/docs/getting-started/installation/${NC}"
+    exit 1
+fi
+
+case "$TEST_TYPE" in
+    ramp-up)
+        echo -e "${GREEN}Running Ramp-Up Test (10->100 VUs over 13 minutes)${NC}"
+        k6 run --out=csv=$OUTPUT_FILE ramp-up.js
+        ;;
+    stress)
+        echo -e "${GREEN}Running Stress Test (up to 500 VUs)${NC}"
+        k6 run --out=csv=$OUTPUT_FILE stress-test.js
+        ;;
+    spike)
+        echo -e "${GREEN}Running Spike Test (sudden 50->500 spike)${NC}"
+        k6 run --out=csv=$OUTPUT_FILE spike-test.js
+        ;;
+    constant)
+        echo -e "${GREEN}Running Constant Load Test (50 VUs for 10m)${NC}"
+        k6 run --out=csv=$OUTPUT_FILE constant-load.js
+        ;;
+    all)
+        echo -e "${GREEN}Running All Tests${NC}"
+        for test in ramp-up stress spike constant; do
+            echo ""
+            echo -e "${BLUE}Starting $test test...${NC}"
+            $0 $test
+            sleep 5
+        done
+        exit 0
+        ;;
+    *)
+        echo -e "${RED}Usage: $0 {ramp-up|stress|spike|constant|all} [output-file]${NC}"
+        echo ""
+        echo "Examples:"
+        echo "  $0 ramp-up"
+        echo "  $0 stress results.csv"
+        echo "  $0 all"
+        exit 1
+        ;;
+esac
+
+echo -e "${GREEN}Test complete. Results saved to $OUTPUT_FILE${NC}"