OK, I have repeated the benchmarks after rebasing and this is what I get:

venv ❯ python -m pyperf compare_to json/2020-12-16_11-20-master-8203c73f3bb1.json.gz json/2020-12-16_11-22-load_method-21b1566125b3.json.gz -G --min-speed=1
Slower (13):
- regex_v8: 30.5 ms +- 0.1 ms -> 32.8 ms +- 0.2 ms: 1.08x slower (+8%)
- pidigits: 253 ms +- 0 ms -> 264 ms +- 0 ms: 1.05x slower (+5%)
- richards: 84.1 ms +- 1.1 ms -> 87.4 ms +- 1.4 ms: 1.04x slower (+4%)
- fannkuch: 573 ms +- 2 ms -> 589 ms +- 14 ms: 1.03x slower (+3%)
- regex_effbot: 3.87 ms +- 0.03 ms -> 3.98 ms +- 0.05 ms: 1.03x slower (+3%)
- scimark_sor: 223 ms +- 4 ms -> 227 ms +- 2 ms: 1.02x slower (+2%)
- pathlib: 20.9 ms +- 0.2 ms -> 21.3 ms +- 0.3 ms: 1.02x slower (+2%)
- regex_compile: 209 ms +- 1 ms -> 212 ms +- 3 ms: 1.01x slower (+1%)
- xml_etree_process: 93.7 ms +- 0.7 ms -> 94.9 ms +- 1.1 ms: 1.01x slower (+1%)
- nqueens: 122 ms +- 1 ms -> 123 ms +- 1 ms: 1.01x slower (+1%)
- regex_dna: 263 ms +- 1 ms -> 266 ms +- 1 ms: 1.01x slower (+1%)
- django_template: 56.1 ms +- 0.4 ms -> 56.7 ms +- 0.4 ms: 1.01x slower (+1%)
- raytrace: 566 ms +- 7 ms -> 572 ms +- 6 ms: 1.01x slower (+1%)

Faster (15):
- unpack_sequence: 80.4 ns +- 0.9 ns -> 70.8 ns +- 0.8 ns: 1.14x faster (-12%)
- scimark_sparse_mat_mult: 6.26 ms +- 0.02 ms -> 5.97 ms +- 0.06 ms: 1.05x faster (-5%)
- pickle_pure_python: 547 us +- 5 us -> 523 us +- 5 us: 1.05x faster (-4%)
- unpickle: 17.7 us +- 0.1 us -> 17.0 us +- 0.2 us: 1.04x faster (-4%)
- mako: 20.0 ms +- 0.1 ms -> 19.5 ms +- 0.1 ms: 1.02x faster (-2%)
- unpickle_pure_python: 361 us +- 4 us -> 353 us +- 4 us: 1.02x faster (-2%)
- logging_simple: 9.59 us +- 0.14 us -> 9.39 us +- 0.12 us: 1.02x faster (-2%)
- scimark_fft: 462 ms +- 4 ms -> 455 ms +- 4 ms: 1.02x faster (-2%)
- chameleon: 11.6 ms +- 0.2 ms -> 11.4 ms +- 0.1 ms: 1.02x faster (-2%)
- pickle: 13.0 us +- 0.1 us -> 12.8 us +- 0.1 us: 1.02x faster (-1%)
- telco: 8.30 ms +- 0.23 ms -> 8.18 ms +- 0.14 ms: 1.01x faster (-1%)
- go: 277 ms +- 2 ms -> 274 ms +- 2 ms: 1.01x faster (-1%)
- pickle_list: 5.30 us +- 0.07 us -> 5.23 us +- 0.06 us: 1.01x faster (-1%)
- logging_format: 10.3 us +- 0.1 us -> 10.2 us +- 0.1 us: 1.01x faster (-1%)
- meteor_contest: 136 ms +- 0 ms -> 134 ms +- 1 ms: 1.01x faster (-1%)

Benchmark hidden because not significant (32): 2to3, chaos, crypto_pyaes, deltablue, dulwich_log, float, genshi_text, genshi_xml, hexiom, json_dumps, json_loads, logging_silent, nbody, pickle_dict, pyflate, python_startup, python_startup_no_site, scimark_lu, scimark_monte_carlo, spectral_norm, sqlalchemy_declarative, sqlalchemy_imperative, sqlite_synth, sympy_expand, sympy_integrate, sympy_sum, sympy_str, tornado_http, unpickle_list, xml_etree_parse, xml_etree_iterparse, xml_etree_generate