From 65e49af692c3ed0dc186108844287e1be78f721a Mon Sep 17 00:00:00 2001
From: "codeflash-ai[bot]"
 <148906541+codeflash-ai[bot]@users.noreply.github.com>
Date: Fri, 10 Oct 2025 08:25:30 +0000
Subject: [PATCH] Optimize extract_project_and_location_from_parent
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The optimized code achieves a 45% speedup by **pre-compiling the regular expression pattern** instead of recompiling it on every function call.

**Key optimization:**
- **Pre-compiled regex pattern**: The regex pattern `r"^projects/(?P<project>.+?)/locations/(?P<location>.+?)(/|$)"` is compiled once at module load time and stored in `_PROJECT_LOCATION_RE`, rather than being recompiled by `re.match()` on every function invocation.

**Why this improves performance:**
- **Eliminates regex compilation overhead**: `re.match()` internally compiles the pattern string into a regex object every time it's called. By using `re.compile()` once and reusing the compiled pattern, we avoid this expensive compilation step.
- **Reduces function call overhead**: The compiled pattern object's `match()` method is called directly, eliminating the need for `re.match()` to parse and compile the pattern string.

**Performance benefits across test cases:**
- **Significant gains on simple cases**: Basic valid inputs show 30-50% improvements (e.g., standard cases improving from ~2.5μs to ~1.7μs)
- **Massive gains on invalid inputs**: Edge cases with invalid patterns show 90-115% improvements (e.g., empty strings improving from ~1.4μs to ~650ns) because the pre-compiled pattern quickly rejects non-matching strings
- **Consistent improvements at scale**: Large-scale tests with 1000+ iterations show 40-50% improvements, demonstrating the optimization scales well with repeated usage

The optimization is most effective for functions called frequently with the same regex pattern, which is typical for utility functions like this one used throughout a codebase.
---
 google/cloud/aiplatform/utils/__init__.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/google/cloud/aiplatform/utils/__init__.py b/google/cloud/aiplatform/utils/__init__.py
index 593222ed0a..def5b3b265 100644
--- a/google/cloud/aiplatform/utils/__init__.py
+++ b/google/cloud/aiplatform/utils/__init__.py
@@ -105,6 +105,10 @@
     reservation_affinity_v1 as gca_reservation_affinity_v1,
 )
 
+_PROJECT_LOCATION_RE = re.compile(
+    r"^projects/(?P<project>.+?)/locations/(?P<location>.+?)(/|$)"
+)
+
 VertexAiServiceClient = TypeVar(
     "VertexAiServiceClient",
     # v1beta1
@@ -399,9 +403,7 @@ def extract_project_and_location_from_parent(
         Dict[str, str]
             A project, location dict from provided parent resource name.
     """
-    parent_resources = re.match(
-        r"^projects/(?P<project>.+?)/locations/(?P<location>.+?)(/|$)", parent
-    )
+    parent_resources = _PROJECT_LOCATION_RE.match(parent)
     return parent_resources.groupdict() if parent_resources else {}