diff --git a/workspace/compariosn/open_spiel_forloop.py b/workspace/compariosn/open_spiel_forloop.py
new file mode 100644
index 000000000..143f1b9e2
--- /dev/null
+++ b/workspace/compariosn/open_spiel_forloop.py
@@ -0,0 +1,49 @@
+from vector_env import SyncVectorEnv
+import argparse
+import time
+import numpy as np
+import collections
+
+
+def make_single_env(env_name: str, seed: int):
+    import pyspiel
+    from open_spiel.python.rl_environment import Environment, ChanceEventSampler
+    def gen_env():
+        game = pyspiel.load_game(env_name)
+        return Environment(game,  chance_event_sampler=ChanceEventSampler(seed=seed))
+    return gen_env()
+
+
+def make_env(env_name: str, n_envs: int, seed: int) -> SyncVectorEnv:
+    return SyncVectorEnv([make_single_env(env_name, seed) for i in range(n_envs)])
+
+
+def random_play(env: SyncVectorEnv, n_steps_lim: int, batch_size: int):
+    # random play for  open spiel
+    StepOutput = collections.namedtuple("step_output", ["action"])
+    time_step = env.reset()
+    rng = np.random.default_rng()
+    step_num = 0
+    while step_num < n_steps_lim:
+        legal_actions = np.array([ts.observations["legal_actions"][ts.observations["current_player"]] for ts in time_step])
+        assert len(env.envs) == len(legal_actions)  # ensure parallerization
+        action = [rng.choice(legal_actions[i]) for i in range(len(legal_actions))]
+        step_outputs = [StepOutput(action=a) for a in action]
+        time_step, reward, done, unreset_time_steps = env.step(step_outputs, reset_if_done=True)
+        step_num += batch_size
+    return step_num
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("env_name")
+    parser.add_argument("batch_size", type=int)
+    parser.add_argument("n_steps_lim", type=int)
+    parser.add_argument("--seed", default=100, type=bool)
+    args = parser.parse_args()
+    assert args.n_steps_lim % args.batch_size == 0
+    env = make_env(args.env_name, args.batch_size, args.seed)
+    time_sta = time.time()
+    step_num = random_play(env, args.n_steps_lim, args.batch_size)
+    time_end = time.time()
+    print((step_num)/(time_end-time_sta), time_end-time_sta)
diff --git a/workspace/compariosn/open_spiel_subproc.py b/workspace/compariosn/open_spiel_subproc.py
new file mode 100644
index 000000000..668f1cbfc
--- /dev/null
+++ b/workspace/compariosn/open_spiel_subproc.py
@@ -0,0 +1,45 @@
+from tianshou_env.pettingzoo_env import OpenSpielEnv
+from tianshou_env.venvs import SubprocVectorEnv
+import numpy as np
+import time
+import argparse
+
+
+def make_single_env(env_name: str, seed: int):
+    import pyspiel
+    from open_spiel.python.rl_environment import Environment, ChanceEventSampler
+    def gen_env():
+        game = pyspiel.load_game(env_name)
+        return Environment(game,  chance_event_sampler=ChanceEventSampler(seed=seed))
+    return gen_env()
+
+def make_env(env_name: str, n_envs: int,  seed: int):
+    return SubprocVectorEnv([lambda: OpenSpielEnv(make_single_env(env_name, seed)) for _ in range(n_envs)])
+
+
+def random_play(env: SubprocVectorEnv, n_steps_lim: int, batch_size: int):
+    step_num = 0
+    rng = np.random.default_rng()
+    observation, info = env.reset()
+    terminated = np.zeros(len(env._env_fns))
+    while step_num < n_steps_lim:
+        legal_action_mask = [observation[i]["mask"] for i in range(len(observation))]
+        action = [rng.choice(legal_action_mask[i]) for i in range(len(legal_action_mask))]  # chose action randomly
+        observation, reward, terminated, _, info = env.step(action)
+        step_num += batch_size
+    return step_num
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("env_name")
+    parser.add_argument("batch_size", type=int)
+    parser.add_argument("n_steps_lim", type=int)
+    parser.add_argument("--seed", default=100, type=bool)
+    args = parser.parse_args()
+    assert args.n_steps_lim % args.batch_size == 0
+    env = make_env(args.env_name, args.batch_size, args.seed)
+    time_sta = time.time()
+    step_num = random_play(env, args.n_steps_lim, args.batch_size)
+    time_end = time.time()
+    print((step_num)/(time_end-time_sta))
diff --git a/workspace/compariosn/petting_zoo_forloop.py b/workspace/compariosn/petting_zoo_forloop.py
new file mode 100644
index 000000000..6b97b4a26
--- /dev/null
+++ b/workspace/compariosn/petting_zoo_forloop.py
@@ -0,0 +1,64 @@
+import argparse
+import time
+import numpy as np
+import collections
+from tianshou.env import DummyVectorEnv
+from tianshou.env.pettingzoo_env import PettingZooEnv
+from pettingzoo.classic.tictactoe import tictactoe
+
+class AutoResetPettingZooEnv(PettingZooEnv):
+    def __init__(self, env):
+        super().__init__(env)
+    
+    def step(self, action):
+        obs, reward, term, trunc, info = super().step(action)
+        if term:
+            obs = super().reset()
+        return obs, reward, term, trunc, info
+
+
+def make_env(env_name, n_envs):
+    from pettingzoo.classic.go import go
+    #from pettingzoo.classic import chess_v5
+    def get_go_env():
+        return AutoResetPettingZooEnv(go.env())
+    def get_tictactoe_env():
+        return AutoResetPettingZooEnv(tictactoe.env())
+    if env_name == "go":
+        return DummyVectorEnv([get_go_env for _ in range(n_envs)])
+    elif env_name == "tictactoe":
+        return DummyVectorEnv([get_tictactoe_env for _ in range(n_envs)])
+    elif env_name == "chess":
+        #return chess_v5.env()
+        raise ValueError("Chess will be added later")
+    else:
+        raise ValueError("no such environment in petting zoo")
+
+
+def random_play(env: DummyVectorEnv, n_steps_lim: int, batch_size: int) -> int:
+    # petting zooのgo環境でrandom gaentを終局まで動かす.
+    step_num = 0
+    rng = np.random.default_rng()
+    observation = env.reset()
+    terminated = np.zeros(len(env._env_fns))
+    while step_num < n_steps_lim:
+        assert len(env._env_fns) == len(observation)  # ensure parallerization
+        legal_action_mask = np.array([observation[i]["mask"] for i in range(len(observation))])
+        action = [rng.choice(np.where(legal_action_mask[i]==1)[0]) for i in range(len(legal_action_mask))]  # chose action randomly
+        observation, reward, terminated, _, _ = env.step(action)
+        step_num += batch_size
+    return step_num
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("env_name")
+    parser.add_argument("batch_size", type=int)
+    parser.add_argument("n_steps_lim", type=int)
+    args = parser.parse_args()
+    assert args.n_steps_lim % args.batch_size == 0
+    env = make_env(args.env_name, args.batch_size)
+    time_sta = time.time()
+    step_num = random_play(env, args.n_steps_lim, args.batch_size)
+    time_end = time.time()
+    print((step_num)/(time_end-time_sta))
\ No newline at end of file
diff --git a/workspace/compariosn/petting_zoo_subproc.py b/workspace/compariosn/petting_zoo_subproc.py
new file mode 100644
index 000000000..ed34cfdd5
--- /dev/null
+++ b/workspace/compariosn/petting_zoo_subproc.py
@@ -0,0 +1,64 @@
+from tianshou.env import SubprocVectorEnv
+from pettingzoo.classic.go import go
+from pettingzoo.classic.tictactoe import tictactoe
+from tianshou.env.pettingzoo_env import PettingZooEnv
+import argparse
+import numpy as np
+import time
+
+class AutoResetPettingZooEnv(PettingZooEnv):  # 全体でpetting_zooの関数, classをimportするとopen_spielの速度が落ちる.
+    def __init__(self, env):
+        super().__init__(env)
+    
+    def step(self, action):
+        obs, reward, term, trunc, info = super().step(action)
+        if term:
+            obs = super().reset()
+        return obs, reward, term, trunc, info
+
+
+def make_env(env_name, n_envs):
+            
+    #from pettingzoo.classic import chess_v5
+    def get_go_env():
+        return AutoResetPettingZooEnv(go.env())
+    def get_tictactoe_env():
+        return AutoResetPettingZooEnv(tictactoe.env())
+    if env_name == "go":
+        return SubprocVectorEnv([get_go_env for _ in range(n_envs)])
+    elif env_name == "tictactoe":
+        return SubprocVectorEnv([get_tictactoe_env for _ in range(n_envs)])
+    elif env_name == "chess":
+        #return chess_v5.env()
+        raise ValueError("Chess will be added later")
+    else:
+        raise ValueError("no such environment in petting zoo")
+
+
+def random_play(env, n_steps_lim: int, batch_size: int) -> int:
+    # petting zooのgo環境でrandom gaentを終局まで動かす.
+    step_num = 0
+    rng = np.random.default_rng()
+    observation = env.reset()
+    terminated = np.zeros(len(env._env_fns))
+    while step_num < n_steps_lim:
+        assert len(env._env_fns) == len(observation)  # ensure parallerization
+        legal_action_mask = np.array([observation[i]["mask"] for i in range(len(observation))])
+        action = [rng.choice(np.where(legal_action_mask[i]==1)[0]) for i in range(len(legal_action_mask))]  # chose action randomly
+        observation, reward, terminated, _, _ = env.step(action)
+        step_num += batch_size
+    return step_num
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("env_name")
+    parser.add_argument("batch_size", type=int)
+    parser.add_argument("n_steps_lim", type=int)
+    args = parser.parse_args()
+    assert args.n_steps_lim % args.batch_size == 0
+    env = make_env(args.env_name, args.batch_size)
+    time_sta = time.time()
+    step_num = random_play(env, args.n_steps_lim, args.batch_size)
+    time_end = time.time()
+    print((step_num)/(time_end-time_sta))
\ No newline at end of file
diff --git a/workspace/compariosn/tianshou_env/venvs.py b/workspace/compariosn/tianshou_env/venvs.py
index 1658e3824..09379e2a8 100644
--- a/workspace/compariosn/tianshou_env/venvs.py
+++ b/workspace/compariosn/tianshou_env/venvs.py
@@ -5,9 +5,9 @@
 import numpy as np
 import packaging
 
-from pettingzoo_env import OpenSpielEnv
-from utils import ENV_TYPE, gym_new_venv_step_type
-from worker import (
+from .pettingzoo_env import OpenSpielEnv
+from .utils import ENV_TYPE, gym_new_venv_step_type
+from .worker import (
     DummyEnvWorker,
     EnvWorker,
     RayEnvWorker,