New GitHub issue #95031 from fcfangcc:<br>
<hr>
<pre>
**Bug report**
Example code in ubuntu20.04(openssl1.1) is much faster than ubuntu22.04(openssl3.x)
Not just speed, CPU occupancy ubuntu22.04(openssl3.x) is many times of ubuntu20.04(openssl1.1)
I'm not sure whether it's OpenSSL or Python adaptation problem
```python
import socket
import ssl
import time
import certifi
hostname = 'www.python.org' # any support https hostname
times = 100
pem_where = certifi.where()
context = ssl.create_default_context()
verify_total_time = 0
for i in range(times):
with socket.create_connection((hostname, 443)) as sock:
with context.wrap_socket(sock, server_hostname=hostname) as ssock:
verify_start_time = time.time()
context.load_verify_locations(pem_where)
verify_total_time += time.time() - verify_start_time
ssock.version()
print(f"total {verify_total_time:.4f}, avg {verify_total_time/times:.4f}")
```
in my environment with docker:
```
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3321 root 20 0 304140 81148 12792 S 42.0 0.8 0:29.69 ipython (ubuntu22.04)
3850 root 20 0 203348 52632 11576 S 16.7 0.5 0:06.34 ipython (ubuntu20.04)
```
```
total 5.8634, avg 0.0586 (ubuntu22.04)
total 0.6753, avg 0.0068 (ubuntu20.04)
```
**Your environment**
<!-- Include as many relevant details as possible about the environment you experienced the bug in -->
- CPython versions tested on: 3.10.5
- Operating system and architecture: ubuntu20.04(openssl1.1) and ubuntu22.04(openssl3.0.2), build from source
- certifi==2022.6.15
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</pre>
<hr>
<a href="https://github.com/python/cpython/issues/95031">View on GitHub</a>
<p>Labels: type-bug</p>
<p>Assignee: </p>