perf: complete industry-standard optimization for frontend & backend

backend/src/main/java/com/rit/portal/service/BusLocationService.java

@@ -45,8 +45,17 @@ public class BusLocationService {
 
     public List<BusLocation> getActiveLocations() {
         Instant threshold = Instant.now().minus(STALE_DURATION);
-        // Clean up stale entries on read
+        return locationCache.values().stream()
+            .filter(loc -> !loc.getLastUpdated().isBefore(threshold))
+            .toList();
+    }
+
+    /**
+     * Periodic background eviction of stale GPS coordinates every 5 minutes
+     */
+    @org.springframework.scheduling.annotation.Scheduled(fixedRate = 300000)
+    public void evictStaleLocations() {
+        Instant threshold = Instant.now().minus(STALE_DURATION);
         locationCache.entrySet().removeIf(entry -> entry.getValue().getLastUpdated().isBefore(threshold));
-        return List.copyOf(locationCache.values());
     }
 }

backend/src/main/resources/application.properties

@@ -3,14 +3,24 @@ spring.datasource.url=jdbc:postgresql://localhost:5432/rit_freshers_hub?sslmode=
 spring.datasource.username=postgres
 spring.datasource.password=${DB_PASSWORD:Amudiesh22@.}
 
+# ─── HIKARICP CONNECTION POOL OPTIMIZATIONS ───
+spring.datasource.hikari.maximum-pool-size=30
+spring.datasource.hikari.minimum-idle=10
+spring.datasource.hikari.idle-timeout=300000
+spring.datasource.hikari.max-lifetime=1200000
+spring.datasource.hikari.connection-timeout=20000
+
 # ─── JPA / HIBERNATE SETTINGS ───
 spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
 spring.jpa.hibernate.ddl-auto=update
-spring.jpa.show-sql=true
-spring.jpa.properties.hibernate.format_sql=true
+spring.jpa.show-sql=false
+spring.jpa.properties.hibernate.format_sql=false
 
-# ─── SERVER PORT ───
+# ─── SERVER PORT & HTTP GZIP COMPRESSION ───
 server.port=8085
+server.compression.enabled=true
+server.compression.mime-types=application/json,application/xml,text/html,text/xml,text/plain,application/javascript,text/css
+server.compression.min-response-size=1024
 
 # ─── GOOGLE OAUTH2 CONFIGURATION ───
 google.client.id=${GOOGLE_CLIENT_ID:81935488244-vmab5t8fipfof1n6l7di7eg4fve6k8lf.apps.googleusercontent.com}
@@ -23,10 +33,8 @@ admin.super.password=${SUPER_ADMIN_PASSWORD:RIT@2026}
 admin.username=${ADMIN_USERNAME:ritadmin}
 admin.password=${ADMIN_PASSWORD:ritadmin2026}
 
-
 # ─── IMS INTEGRATION CONFIGURATION ───
 # Options: "mock" (active now for testing & simulation) | "real" (for live college IMS)
 ims.client.type=mock
 ims.base-url=${IMS_BASE_URL:https://api.ims.ritchennai.edu.in}
 ims.api-key=${IMS_API_KEY:rit_nexus_vps_secret_key_2026}
-