[Do not merge] [Asp.Net Core] Measure req/sec with instrumentation

[vishweshbankwar]

Measures req/sec impact on a ASP.NET Core app(targeting .NET8.0) with instrumentation enabled using https://github.com/codesenberg/bombardier

Command used:

bombardier-windows-amd64.exe -c 1 -n 1000000 http://localhost:5000/weatherforecast

Results

1. Trace And Metric Instrumentation

Bombarding http://localhost:5000/weatherforecast with 1000000 request(s) using 1 connection(s)
 1000000 / 1000000 [========================================================================================================================] 100.00% 6002/s 2m46s
Done!
Statistics        Avg      Stdev        Max
  Reqs/sec      6005.23     509.48    7084.00
  Latency      165.13us   117.97us   117.31ms
  HTTP codes:
    1xx - 0, 2xx - 1000000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     3.57MB/s

2. Trace Instrumentation

Bombarding http://localhost:5000/weatherforecast with 1000000 request(s) using 1 connection(s)
 1000000 / 1000000 [========================================================================================================================] 100.00% 6112/s 2m43s
Done!
Statistics        Avg      Stdev        Max
  Reqs/sec      6118.72     507.04    7395.20
  Latency      162.23us    94.47us    92.02ms
  HTTP codes:
    1xx - 0, 2xx - 1000000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     3.64MB/s

3. Metric Instrumentation

Bombarding http://localhost:5000/weatherforecast with 1000000 request(s) using 1 connection(s)
 1000000 / 1000000 [========================================================================================================================] 100.00% 6427/s 2m35s
Done!
Statistics        Avg      Stdev        Max
  Reqs/sec      6431.07     540.13    7982.89
  Latency      154.04us   109.53us   101.28ms
  HTTP codes:
    1xx - 0, 2xx - 1000000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     3.83MB/s

4. No Instrumentation

Bombarding http://localhost:5000/weatherforecast with 1000000 request(s) using 1 connection(s)
 1000000 / 1000000 [========================================================================================================================] 100.00% 6784/s 2m27s
Done!
Statistics        Avg      Stdev        Max
  Reqs/sec      6789.88     588.87    7867.86
  Latency      144.79us   104.19us   102.57ms
  HTTP codes:
    1xx - 0, 2xx - 1000000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     4.04MB/s

5. Diagnostic Source subscription

Bombarding http://localhost:5000/weatherforecast with 1000000 request(s) using 1 connection(s)
 1000000 / 1000000 [========================================================================================================================] 100.00% 6460/s 2m34s
Done!
Statistics        Avg      Stdev        Max
  Reqs/sec      6461.67     530.93    7783.66
  Latency      153.22us   107.38us   106.49ms
  HTTP codes:
    1xx - 0, 2xx - 1000000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:     3.84MB/s

Summary

1. In case when both trace and metric instrumentation is enabled, req/sec dropped by ~13%
2. In case when just trace instrumentation is enabled, req/sec is dropped by ~11%
3. In case when just metric instrumentation is enabled, req/sec is dropped by ~5.5%
4. In case when just the diagnostic source subscription is enabled without activity/metric enrichment, req/sec is dropped by ~5%. This test is just to calculate the overhead caused by subscribing to DiagnosticSource events.

[codecov]

Codecov Report

Merging #5138 (cd0cb2e) into main (bb3a91a) will increase coverage by 0.19%.
Report is 6 commits behind head on main.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5138      +/-   ##
==========================================
+ Coverage   82.81%   83.01%   +0.19%     
==========================================
  Files         296      296              
  Lines       12320    12320              
==========================================
+ Hits        10203    10227      +24     
+ Misses       2117     2093      -24     

Flag	Coverage Δ
unittests	83.01% <ø> (+0.19%)	⬆️

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see 3 files with indirect coverage changes