diff --git a/README.md b/README.md
index 9aeed09..c47eb7d 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# ilock v.1.0.3
+# ilock v.1.0.4
 
 
 ## About
@@ -62,6 +62,12 @@ with lock:
     ...
 ```
 
+### changelog:
+v.1.0.4:
+> Minor performance improvement for linux OS:
+
+> ```when no file location is set, it will use by default the OS memory directory structure```
+
 
 ## License
 
diff --git a/ilock/__init__.py b/ilock/__init__.py
index 0d223fe..21e67c3 100644
--- a/ilock/__init__.py
+++ b/ilock/__init__.py
@@ -7,6 +7,9 @@
 
 import portalocker
 
+#linux memory file directory, for better performance
+MEMORY_FILE_DIRECTORY = '/dev/shm/'
+TEMP_DIR = MEMORY_FILE_DIRECTORY if os.path.isdir(MEMORY_FILE_DIRECTORY) else gettempdir()
 
 class ILockException(Exception):
     pass
@@ -17,7 +20,7 @@ def __init__(self, name, timeout=None, check_interval=0.25, reentrant=False, loc
         self._timeout = timeout if timeout is not None else 10 ** 8
         self._check_interval = check_interval
 
-        lock_directory = gettempdir() if lock_directory is None else lock_directory
+        lock_directory = TEMP_DIR if lock_directory is None else lock_directory
         unique_token = sha256(name.encode()).hexdigest()
         self._filepath = os.path.join(lock_directory, 'ilock-' + unique_token + '.lock')
 
@@ -55,8 +58,12 @@ def __exit__(self, exc_type, exc_val, exc_tb):
             return
 
         if sys.platform.startswith('linux'):
-            # In Linux you can delete a locked file
-            os.unlink(self._filepath)
+            try:
+                # In Linux you can delete a locked file
+                os.unlink(self._filepath)
+            except FileNotFoundError:
+                # this can happen very rarely
+                pass
 
         self._lockfile.close()
 
diff --git a/setup.py b/setup.py
index ee19c59..9575c18 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 from setuptools import setup
 
-version = '1.0.3'
+version = '1.0.4'
 
 setup(
     name='ilock',