From bab567a14afb7e9cdb112503e8adc32f32875714 Mon Sep 17 00:00:00 2001
From: Pathompum Jirakarnpaisan <107536914+Saannddy@users.noreply.github.com>
Date: Thu, 9 Apr 2026 21:59:53 +0700
Subject: [PATCH 1/3] refactor: optimize Java compilation and execution by
 setting release version, clearing environment variables, and adjusting JVM
 memory settings

---
 README.md            |  4 ++--
 src/core/executor.py | 28 +++++++++++++++-------------
 2 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/README.md b/README.md
index 39d3c94..ed2b979 100644
--- a/README.md
+++ b/README.md
@@ -110,8 +110,8 @@ Seed the database with Java MCQs, riddles, and problems tagged as `JAV_RESTROOM`
 
 ```bash
 # Running via Docker (Must rebuild if scripts are modified)
-docker compose --profile local up -d --build
-docker compose --profile local exec local-code-api python3 -m scripts.seeders.seed_restroom_java
+docker compose --profile local up -d --builddocker compose --profile local exec local-code-api python3 -m scripts.seeders.seed_restroom_java
+
 
 # Running Locally (Ensure .env is configured or set DATABASE_URL)
 export DATABASE_URL=postgresql://postgres:postgres@localhost:5432/code_executor
diff --git a/src/core/executor.py b/src/core/executor.py
index b791ef1..cecb0b0 100644
--- a/src/core/executor.py
+++ b/src/core/executor.py
@@ -122,26 +122,28 @@ def _run_java(code, tests=None, timeout=None):
             f.write(code)
             
         try:
-            # Added JVM args to javac to speed up its own startup time
+            # Compile with --release 11 for broad compatibility and fast startup
             comp = subprocess.run([
-                "javac", 
-                "-J-XX:+TieredCompilation", 
-                "-J-XX:TieredStopAtLevel=1", 
+                "javac",
+                "-J-XX:+TieredCompilation",
+                "-J-XX:TieredStopAtLevel=1",
+                "--release", "11",
                 src, "-d", d
-            ], capture_output=True, text=True, timeout=max(timeout, 10), cwd=d)
+            ], capture_output=True, text=True, timeout=max(timeout, 10), cwd=d,
+               env={**os.environ, "JAVA_TOOL_OPTIONS": ""})
             if comp.returncode:
                 return {"status": "incorrect", "message": "Compilation failed", "compiler_output": comp.stderr}
         except subprocess.TimeoutExpired:
             return {"status": "error", "message": "Compilation timed out"}
-            
-        # Optimized JVM startup arguments
+
+        # Optimized JVM startup arguments (removed deprecated -noverify)
         cmd = [
-            "java", 
-            "-cp", d, 
-            f"-Xmx{MAX_MEMORY_MB}m", 
-            "-XX:+TieredCompilation", 
-            "-XX:TieredStopAtLevel=1", 
-            "-noverify",
+            "java",
+            "-cp", d,
+            f"-Xmx{MAX_MEMORY_MB}m",
+            f"-Xms32m",
+            "-XX:+TieredCompilation",
+            "-XX:TieredStopAtLevel=1",
             class_name
         ]
         if tests is None:

From 1d3058c4f847794012a61be6b74237e72f97fd7b Mon Sep 17 00:00:00 2001
From: Pathompum Jirakarnpaisan <107536914+Saannddy@users.noreply.github.com>
Date: Thu, 9 Apr 2026 22:01:01 +0700
Subject: [PATCH 2/3] docs: fix formatting of docker compose commands in README

---
 README.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ed2b979..47cddc0 100644
--- a/README.md
+++ b/README.md
@@ -110,7 +110,8 @@ Seed the database with Java MCQs, riddles, and problems tagged as `JAV_RESTROOM`
 
 ```bash
 # Running via Docker (Must rebuild if scripts are modified)
-docker compose --profile local up -d --builddocker compose --profile local exec local-code-api python3 -m scripts.seeders.seed_restroom_java
+docker compose --profile local up -d --build
+docker compose --profile local exec local-code-api python3 -m scripts.seeders.seed_restroom_java
 
 
 # Running Locally (Ensure .env is configured or set DATABASE_URL)

From 12ea78fe55542eb698d74500329b2fb081c03ef5 Mon Sep 17 00:00:00 2001
From: Pathompum Jirakarnpaisan <107536914+Saannddy@users.noreply.github.com>
Date: Thu, 9 Apr 2026 22:01:24 +0700
Subject: [PATCH 3/3] docs: remove redundant whitespace from README setup
 instructions

---
 README.md | 1 -
 1 file changed, 1 deletion(-)

diff --git a/README.md b/README.md
index 47cddc0..39d3c94 100644
--- a/README.md
+++ b/README.md
@@ -113,7 +113,6 @@ Seed the database with Java MCQs, riddles, and problems tagged as `JAV_RESTROOM`
 docker compose --profile local up -d --build
 docker compose --profile local exec local-code-api python3 -m scripts.seeders.seed_restroom_java
 
-
 # Running Locally (Ensure .env is configured or set DATABASE_URL)
 export DATABASE_URL=postgresql://postgres:postgres@localhost:5432/code_executor
 PYTHONPATH=src python3 src/scripts/seeders/seed_restroom_java.py