def ll_call_lookup_function(d, key, hash, flag):
fun = d.lookup_function_no & FUNC_MASK
# This likely() here forces gcc to compile the check for fun == FUNC_BYTE
# first. Otherwise, this is a regular switch and gcc (at least 4.7)
# compiles this as a series of checks, with the FUNC_BYTE case last.
# It sounds minor, but it is worth 6-7% on a PyPy microbenchmark.
if likely(fun == FUNC_BYTE):
return ll_dict_lookup(d, key, hash, flag, TYPE_BYTE)
elif fun == FUNC_SHORT:
return ll_dict_lookup(d, key, hash, flag, TYPE_SHORT)
elif IS_64BIT and fun == FUNC_INT:
return ll_dict_lookup(d, key, hash, flag, TYPE_INT)
elif fun == FUNC_LONG:
return ll_dict_lookup(d, key, hash, flag, TYPE_LONG)
assert False
def ll_call_lookup_function(d, key, hash, flag):
fun = d.lookup_function_no & FUNC_MASK
# This likely() here forces gcc to compile the check for fun == FUNC_BYTE
# first. Otherwise, this is a regular switch and gcc (at least 4.7)
# compiles this as a series of checks, with the FUNC_BYTE case last.
# It sounds minor, but it is worth 6-7% on a PyPy microbenchmark.
if likely(fun == FUNC_BYTE):
return ll_dict_lookup(d, key, hash, flag, TYPE_BYTE)
elif fun == FUNC_SHORT:
return ll_dict_lookup(d, key, hash, flag, TYPE_SHORT)
elif IS_64BIT and fun == FUNC_INT:
return ll_dict_lookup(d, key, hash, flag, TYPE_INT)
elif fun == FUNC_LONG:
return ll_dict_lookup(d, key, hash, flag, TYPE_LONG)
assert False
def f(n):
if unlikely(n > 50):
return -10
if likely(n > 5):
return 42
return 3
