From 3e5dc47fb1a212732efbc2a24b0e87fa5523d3e4 Mon Sep 17 00:00:00 2001
From: TheGupta2012 <harshit.11235@gmail.com>
Date: Tue, 24 Jun 2025 13:06:13 +0530
Subject: [PATCH 1/2] add slots

---
 src/pyqasm/elements.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/pyqasm/elements.py b/src/pyqasm/elements.py
index 6f9ebda7..3e4936c7 100644
--- a/src/pyqasm/elements.py
+++ b/src/pyqasm/elements.py
@@ -43,7 +43,7 @@ class Context(Enum):
     GATE = "gate"
 
 
-@dataclass
+@dataclass(slots=True)
 class DepthNode:
     """Base class for depth nodes."""
 
@@ -52,7 +52,7 @@ class DepthNode:
     depth: int = 0
 
 
-@dataclass
+@dataclass(slots=True)
 class QubitDepthNode(DepthNode):
     """Qubit depth node."""
 
@@ -68,7 +68,7 @@ def is_idle(self) -> bool:
         return self._total_ops() == 0
 
 
-@dataclass
+@dataclass(slots=True)
 class ClbitDepthNode(DepthNode):
     """Classical bit depth node."""
 
@@ -78,7 +78,7 @@ def is_idle(self) -> bool:
         return self.num_measurements == 0
 
 
-@dataclass
+@dataclass(slots=True)
 class Variable:  # pylint: disable=too-many-instance-attributes
     """
     Class representing an OpenQASM variable.

From 22055d9a77a12595cb951feea4a5bddaeae1c5ac Mon Sep 17 00:00:00 2001
From: TheGupta2012 <harshit.11235@gmail.com>
Date: Tue, 24 Jun 2025 13:10:01 +0530
Subject: [PATCH 2/2] add changelog [no ci]

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b77a015..1da1d0c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ Types of changes:
 - A github workflow for validating `CHANGELOG` updates in a PR ([#214](https://github.com/qBraid/pyqasm/pull/214))
 
 ### Improved / Modified
+- Added `slots=True` parameter to the data classes in `elements.py` to improve memory efficiency ([#218](https://github.com/qBraid/pyqasm/pull/218))
 
 ### Deprecated