Issue #13134: optimize finding single-character strings using memchr
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index 9a5862d..f79b2f0 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -171,6 +171,15 @@
def test_find(self):
string_tests.CommonTest.test_find(self)
+ # test implementation details of the memchr fast path
+ self.checkequal(100, 'a' * 100 + '\u0102', 'find', '\u0102')
+ self.checkequal(-1, 'a' * 100 + '\u0102', 'find', '\u0201')
+ self.checkequal(-1, 'a' * 100 + '\u0102', 'find', '\u0120')
+ self.checkequal(-1, 'a' * 100 + '\u0102', 'find', '\u0220')
+ self.checkequal(100, 'a' * 100 + '\U00100304', 'find', '\U00100304')
+ self.checkequal(-1, 'a' * 100 + '\U00100304', 'find', '\U00100204')
+ self.checkequal(-1, 'a' * 100 + '\U00100304', 'find', '\U00102004')
+ # check mixed argument types
self.checkequalnofix(0, 'abcdefghiabc', 'find', 'abc')
self.checkequalnofix(9, 'abcdefghiabc', 'find', 'abc', 1)
self.checkequalnofix(-1, 'abcdefghiabc', 'find', 'def', 4)
@@ -180,6 +189,14 @@
def test_rfind(self):
string_tests.CommonTest.test_rfind(self)
+ # test implementation details of the memrchr fast path
+ self.checkequal(0, '\u0102' + 'a' * 100 , 'rfind', '\u0102')
+ self.checkequal(-1, '\u0102' + 'a' * 100 , 'rfind', '\u0201')
+ self.checkequal(-1, '\u0102' + 'a' * 100 , 'rfind', '\u0120')
+ self.checkequal(-1, '\u0102' + 'a' * 100 , 'rfind', '\u0220')
+ self.checkequal(0, '\U00100304' + 'a' * 100, 'rfind', '\U00100304')
+ self.checkequal(-1, '\U00100304' + 'a' * 100, 'rfind', '\U00100204')
+ self.checkequal(-1, '\U00100304' + 'a' * 100, 'rfind', '\U00102004')
# check mixed argument types
self.checkequalnofix(9, 'abcdefghiabc', 'rfind', 'abc')
self.checkequalnofix(12, 'abcdefghiabc', 'rfind', '')