From 71a2201e4c913daed186cbd01dac68ca297bf405 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Mon, 3 Jun 2024 17:39:26 -0700
Subject: [PATCH 1/4] Avoids comprehension iterators

---
 pandas/core/internals/managers.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/pandas/core/internals/managers.py b/pandas/core/internals/managers.py
index 82b88d090f847..4172d1cdd520c 100644
--- a/pandas/core/internals/managers.py
+++ b/pandas/core/internals/managers.py
@@ -419,11 +419,10 @@ def apply(
         result_blocks: list[Block] = []
         # fillna: Series/DataFrame is responsible for making sure value is aligned
 
-        aligned_args = {k: kwargs[k] for k in align_keys}
-
         for b in self.blocks:
-            if aligned_args:
-                for k, obj in aligned_args.items():
+            if align_keys:
+                for k in align_keys:
+                    obj = kwargs[k]
                     if isinstance(obj, (ABCSeries, ABCDataFrame)):
                         # The caller is responsible for ensuring that
                         #  obj.axes[-1].equals(self.items)

From c0ca2750bc894aa7cbfb198b6238335ed17b924d Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Tue, 4 Jun 2024 11:32:06 -0700
Subject: [PATCH 2/4] Avoid reiterating

---
 pandas/core/apply.py | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/pandas/core/apply.py b/pandas/core/apply.py
index 33f506235870d..3d9f3758b0cd0 100644
--- a/pandas/core/apply.py
+++ b/pandas/core/apply.py
@@ -480,20 +480,14 @@ def compute_dict_like(
                 cols = df[key]
 
                 if cols.ndim == 1:
-                    series_list = [obj._gotitem(key, ndim=1, subset=cols)]
+                    series = obj._gotitem(key, ndim=1, subset=cols)
+                    results.append(getattr(series, op_name)(how, **kwargs))
+                    keys.append(key)
                 else:
-                    series_list = []
-                    for index in range(cols.shape[1]):
-                        col = cols.iloc[:, index]
-
+                    for _, col in cols.items():
                         series = obj._gotitem(key, ndim=1, subset=col)
-                        series_list.append(series)
-
-                for series in series_list:
-                    result = getattr(series, op_name)(how, **kwargs)
-                    results.append(result)
-                    keys.append(key)
-
+                        results.append(getattr(series, op_name)(how, **kwargs))
+                        keys.append(key)
         else:
             results = [
                 getattr(obj._gotitem(key, ndim=1), op_name)(how, **kwargs)

From de19febf839a73a3cc1e966043332f193f2aa9b4 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Mon, 22 Jul 2024 13:15:30 -0700
Subject: [PATCH 3/4] Undo managers

---
 pandas/core/apply.py              | 1 +
 pandas/core/internals/managers.py | 7 ++++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/pandas/core/apply.py b/pandas/core/apply.py
index 5959156d11123..4f466b9f56e06 100644
--- a/pandas/core/apply.py
+++ b/pandas/core/apply.py
@@ -482,6 +482,7 @@ def compute_dict_like(
 
             df = selected_obj
             results, keys = [], []
+
             for key, how in func.items():
                 cols = df[key]
 
diff --git a/pandas/core/internals/managers.py b/pandas/core/internals/managers.py
index e4b8a2877d5ab..c42ea44b2fc89 100644
--- a/pandas/core/internals/managers.py
+++ b/pandas/core/internals/managers.py
@@ -416,10 +416,11 @@ def apply(
         result_blocks: list[Block] = []
         # fillna: Series/DataFrame is responsible for making sure value is aligned
 
+        aligned_args = {k: kwargs[k] for k in align_keys}
+
         for b in self.blocks:
-            if align_keys:
-                for k in align_keys:
-                    obj = kwargs[k]
+            if aligned_args:
+                for k, obj in aligned_args.items():
                     if isinstance(obj, (ABCSeries, ABCDataFrame)):
                         # The caller is responsible for ensuring that
                         #  obj.axes[-1].equals(self.items)

From 02bc89066f922cfd63a633344ab5cded876f5c10 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Mon, 22 Jul 2024 13:16:00 -0700
Subject: [PATCH 4/4] Undo whitespace

---
 pandas/core/apply.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/pandas/core/apply.py b/pandas/core/apply.py
index 4f466b9f56e06..5959156d11123 100644
--- a/pandas/core/apply.py
+++ b/pandas/core/apply.py
@@ -482,7 +482,6 @@ def compute_dict_like(
 
             df = selected_obj
             results, keys = [], []
-
             for key, how in func.items():
                 cols = df[key]