BENCH: Fix CategoricalIndexing benchmark (#38476)

Author: mroeschke

.github/workflows/ci.yml

@@ -74,14 +74,10 @@ jobs:
         asv check -E existing
         git remote add upstream https://github.com/pandas-dev/pandas.git
         git fetch upstream
-        if git diff upstream/master --name-only | grep -q "^asv_bench/"; then
-            asv machine --yes
-            asv dev | sed "/failed$/ s/^/##[error]/" | tee benchmarks.log
-            if grep "failed" benchmarks.log > /dev/null ; then
-                exit 1
-            fi
-        else
-            echo "Benchmarks did not run, no changes detected"
+        asv machine --yes
+        asv dev | sed "/failed$/ s/^/##[error]/" | tee benchmarks.log
+        if grep "failed" benchmarks.log > /dev/null ; then
+            exit 1
         fi
       if: always()
 

asv_bench/benchmarks/indexing.py

@@ -3,6 +3,7 @@
 lower-level methods directly on Index and subclasses, see index_object.py,
 indexing_engine.py, and index_cached.py
 """
+import string
 import warnings
 
 import numpy as np
@@ -255,6 +256,7 @@ def setup(self, index):
             "non_monotonic": CategoricalIndex(list("abc" * N)),
         }
         self.data = indices[index]
+        self.data_unique = CategoricalIndex(list(string.printable))
 
         self.int_scalar = 10000
         self.int_list = list(range(10000))
@@ -281,7 +283,7 @@ def time_get_loc_scalar(self, index):
         self.data.get_loc(self.cat_scalar)
 
     def time_get_indexer_list(self, index):
-        self.data.get_indexer(self.cat_list)
+        self.data_unique.get_indexer(self.cat_list)
 
 
 class MethodLookup: