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author | Ava Chow <github@achow101.com> | 2024-09-03 17:27:50 -0400 |
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committer | Ava Chow <github@achow101.com> | 2024-09-03 17:27:50 -0400 |
commit | 94c307b3c0746a08c6135ff38d6f1ad1ed6693bb (patch) | |
tree | be99eab0e7750dac4fc5740e49bf84be6d6aafab /contrib/macdeploy/background.tiff | |
parent | 27e89bc2f585e5bfef48de500c6c5ecd0565b437 (diff) | |
parent | 03d49d0f25ab5660524d5ddd171de677a808b984 (diff) | |
download | bitcoin-master.tar.xz |
03d49d0f25ab5660524d5ddd171de677a808b984 http: set TCP_NODELAY when creating HTTP server (Roman Zeyde)
Pull request description:
Otherwise, the default HTTP server config may result in high latency, due to Nagle's algorithm (on the server) and delayed ACK (on the client):
[1] https://www.extrahop.com/blog/tcp-nodelay-nagle-quickack-best-practices
[2] https://eklitzke.org/the-caveats-of-tcp-nodelay
Without the fix, fetching a small block takes ~40ms (when connection keep-alive is enabled):
```
$ ab -k -c 1 -n 100 http://localhost:8332/rest/block/00000000000002b5898f7cdc80d9c84e9747bc6b9388cc989971d443f05713ee.bin
Server Software:
Server Hostname: localhost
Server Port: 8332
Document Path: /rest/block/00000000000002b5898f7cdc80d9c84e9747bc6b9388cc989971d443f05713ee.bin
Document Length: 25086 bytes
Concurrency Level: 1
Time taken for tests: 4.075 seconds
Complete requests: 100
Failed requests: 0
Keep-Alive requests: 100
Total transferred: 2519200 bytes
HTML transferred: 2508600 bytes
Requests per second: 24.54 [#/sec] (mean)
Time per request: 40.747 [ms] (mean)
Time per request: 40.747 [ms] (mean, across all concurrent requests)
Transfer rate: 603.76 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.0 0 0
Processing: 0 41 4.1 41 42
Waiting: 0 0 0.1 0 1
Total: 0 41 4.1 41 42
Percentage of the requests served within a certain time (ms)
50% 41
66% 41
75% 41
80% 41
90% 42
95% 42
98% 42
99% 42
100% 42 (longest request)
```
With the fix, it takes ~0.2ms:
```
$ ab -k -c 1 -n 1000 http://localhost:8332/rest/block/00000000000002b5898f7cdc80d9c84e9747bc6b9388cc989971d443f05713ee.bin
Benchmarking localhost (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests
Server Software:
Server Hostname: localhost
Server Port: 8332
Document Path: /rest/block/00000000000002b5898f7cdc80d9c84e9747bc6b9388cc989971d443f05713ee.bin
Document Length: 25086 bytes
Concurrency Level: 1
Time taken for tests: 0.194 seconds
Complete requests: 1000
Failed requests: 0
Keep-Alive requests: 1000
Total transferred: 25192000 bytes
HTML transferred: 25086000 bytes
Requests per second: 5147.05 [#/sec] (mean)
Time per request: 0.194 [ms] (mean)
Time per request: 0.194 [ms] (mean, across all concurrent requests)
Transfer rate: 126625.50 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.0 0 0
Processing: 0 0 0.0 0 0
Waiting: 0 0 0.0 0 0
Total: 0 0 0.0 0 0
Percentage of the requests served within a certain time (ms)
50% 0
66% 0
75% 0
80% 0
90% 0
95% 0
98% 0
99% 0
100% 0 (longest request)
```
ACKs for top commit:
achow101:
ACK 03d49d0f25ab5660524d5ddd171de677a808b984
theStack:
re-ACK 03d49d0f25ab5660524d5ddd171de677a808b984
tdb3:
ACK 03d49d0f25ab5660524d5ddd171de677a808b984
Tree-SHA512: bbf3d78b8521f569430850ec4315a75711303547df1a3de213a4ad34c9700105e374e0a649352fd05f8e4badb5b59debd3720e1c5d392c5113d7816648f7fcaa
Diffstat (limited to 'contrib/macdeploy/background.tiff')
0 files changed, 0 insertions, 0 deletions