Do short identifiers make python run faster?

identifier.sh

#!/bin/sh
set -eu
A=0
IDENTIFIER="$(python3 -c 'print("a" * 100_000, end="")')"
export IDENTIFIER

echo "IDENTIFIER is ${#IDENTIFIER} characters"

for python_version in python3.6 python3.7 python3.8 python3.9; do
    echo "${python_version}"

    printf 'short identifier -> '
    "${python_version}" -m timeit \
        -s "a = 1" \
        -s "${IDENTIFIER} = 1" \
        -s "def short(): a + 1" \
        -s "def long(): ${IDENTIFIER} + 1" \
        "short()"

    printf 'long  identifier -> '
    "${python_version}" -m timeit \
        -s "a = 1" \
        -s "${IDENTIFIER} = 1" \
        -s "def short(): a + 1" \
        -s "def long(): ${IDENTIFIER} + 1" \
        "long()"
done

IDENTIFIER is 100000 characters
python3.6
short identifier -> 10000000 loops, best of 3: 0.113 usec per loop
long  identifier -> 10000000 loops, best of 3: 0.112 usec per loop
python3.7
short identifier -> 5000000 loops, best of 5: 84.6 nsec per loop
long  identifier -> 5000000 loops, best of 5: 81.2 nsec per loop
python3.8
short identifier -> 2000000 loops, best of 5: 104 nsec per loop
long  identifier -> 2000000 loops, best of 5: 104 nsec per loop
python3.9
short identifier -> 2000000 loops, best of 5: 110 nsec per loop
long  identifier -> 2000000 loops, best of 5: 114 nsec per loop

no appreciable difference