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#!/usr/bin/env python3
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
import io
import json
import lzma
import os
import sys
from pathlib import Path
from timeit import timeit
import rapidjson
import simplejson
import ujson
from tabulate import tabulate
import orjson
os.sched_setaffinity(os.getpid(), {0, 1})
dirname = os.path.join(os.path.dirname(__file__), "..", "data")
def read_fixture_obj(filename):
path = Path(dirname, filename)
if path.suffix == ".xz":
contents = lzma.decompress(path.read_bytes())
else:
contents = path.read_bytes()
return orjson.loads(contents)
filename = sys.argv[1] if len(sys.argv) >= 1 else ""
data = read_fixture_obj(f"{filename}.json.xz")
headers = ("Library", "compact (ms)", "pretty (ms)", "vs. orjson")
LIBRARIES = ("orjson", "ujson", "rapidjson", "simplejson", "json")
output_in_kib_compact = len(orjson.dumps(data)) / 1024
output_in_kib_pretty = len(orjson.dumps(data, option=orjson.OPT_INDENT_2)) / 1024
# minimum 2s runtime for orjson compact
ITERATIONS = int(2 / (timeit(lambda: orjson.dumps(data), number=20) / 20))
print(
f"{output_in_kib_compact:,.0f}KiB compact, {output_in_kib_pretty:,.0f}KiB pretty, {ITERATIONS} iterations"
)
def per_iter_latency(val):
if val is None:
return None
return (val * 1000) / ITERATIONS
def test_correctness(serialized):
return orjson.loads(serialized) == data
table = []
for lib_name in LIBRARIES:
print(f"{lib_name}...")
if lib_name == "json":
time_compact = timeit(
lambda: json.dumps(data).encode("utf-8"),
number=ITERATIONS,
)
time_pretty = timeit(
lambda: json.dumps(data, indent=2).encode("utf-8"),
number=ITERATIONS,
)
correct = test_correctness(json.dumps(data, indent=2).encode("utf-8"))
elif lib_name == "simplejson":
time_compact = timeit(
lambda: simplejson.dumps(data).encode("utf-8"),
number=ITERATIONS,
)
time_pretty = timeit(
lambda: simplejson.dumps(data, indent=2).encode("utf-8"),
number=ITERATIONS,
)
correct = test_correctness(simplejson.dumps(data, indent=2).encode("utf-8"))
elif lib_name == "ujson":
time_compact = timeit(
lambda: ujson.dumps(data).encode("utf-8"),
number=ITERATIONS,
)
time_pretty = timeit(
lambda: ujson.dumps(data, indent=2).encode("utf-8"),
number=ITERATIONS,
)
correct = test_correctness(ujson.dumps(data, indent=2).encode("utf-8"))
elif lib_name == "rapidjson":
time_compact = timeit(lambda: rapidjson.dumps(data), number=ITERATIONS)
time_pretty = timeit(lambda: rapidjson.dumps(data, indent=2), number=ITERATIONS)
correct = test_correctness(rapidjson.dumps(data, indent=2))
elif lib_name == "orjson":
time_compact = timeit(lambda: orjson.dumps(data), number=ITERATIONS)
time_pretty = timeit(
lambda: orjson.dumps(data, None, orjson.OPT_INDENT_2),
number=ITERATIONS,
)
correct = test_correctness(orjson.dumps(data, None, orjson.OPT_INDENT_2))
orjson_time_pretty = per_iter_latency(time_pretty)
else:
raise NotImplementedError
time_compact = per_iter_latency(time_compact)
if not correct:
time_pretty = None
else:
time_pretty = per_iter_latency(time_pretty)
if lib_name == "orjson":
compared_to_orjson = 1
elif time_pretty:
compared_to_orjson = time_pretty / orjson_time_pretty
else:
compared_to_orjson = None
table.append(
(
lib_name,
f"{time_compact:,.2f}" if time_compact else "",
f"{time_pretty:,.2f}" if time_pretty else "",
f"{compared_to_orjson:,.1f}" if compared_to_orjson else "",
)
)
buf = io.StringIO()
buf.write(tabulate(table, headers, tablefmt="github"))
buf.write("\n")
print(buf.getvalue())
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