diff --git a/codeflash/telemetry/posthog_cf.py b/codeflash/telemetry/posthog_cf.py
index 106817771..ed166ff44 100644
--- a/codeflash/telemetry/posthog_cf.py
+++ b/codeflash/telemetry/posthog_cf.py
@@ -12,7 +12,7 @@
 _posthog = None
 
 
-def initialize_posthog(enabled: bool = True) -> None:  # noqa: FBT001, FBT002
+def initialize_posthog(enabled: bool = True) -> None:
     """Enable or disable PostHog.
 
     :param enabled: Whether to enable PostHog.
@@ -20,9 +20,16 @@ def initialize_posthog(enabled: bool = True) -> None:  # noqa: FBT001, FBT002
     if not enabled:
         return
 
-    global _posthog  # noqa: PLW0603
+    global _posthog, _user_id  # noqa: PLW0603
+    if _posthog is not None:
+        return  # Fast re-init path
+
     _posthog = Posthog(project_api_key="phc_aUO790jHd7z1SXwsYCz8dRApxueplZlZWeDSpKc5hol", host="https://us.posthog.com")  # type: ignore[no-untyped-call]
     _posthog.log.setLevel(logging.CRITICAL)  # Suppress PostHog logging
+
+    # Pre-fetch user_id for this session and cache it
+    _user_id = get_user_id()
+
     ph("cli-telemetry-enabled")
 
 
@@ -35,12 +42,20 @@ def ph(event: str, properties: dict[str, Any] | None = None) -> None:
     if _posthog is None:
         return
 
-    properties = properties or {}
-    properties.update({"cli_version": __version__})
+    # Build the property dict only once per call
+    props = {} if properties is None else dict(properties)
+    props["cli_version"] = __version__
 
-    user_id = get_user_id()
+    # Use cached user_id if available, else fetch and memoize once per process run
+    global _user_id  # noqa: PLW0603
+    if _user_id is None:
+        _user_id = get_user_id()
+    user_id = _user_id
 
     if user_id:
-        _posthog.capture(distinct_id=user_id, event=event, properties=properties)  # type: ignore[no-untyped-call]
+        _posthog.capture(distinct_id=user_id, event=event, properties=props)  # type: ignore[no-untyped-call]
     else:
         logger.debug("Failed to log event to PostHog: User ID could not be retrieved.")
+
+
+_user_id = None