ASP.NET Benchmarks

The ASP.NET benchmarks measure the throughput and latency of ASP.NET Kestrel web applications under sustained HTTP load. The workloads use a client-server architecture where the server runs an ASP.NET application and the client generates HTTP requests using various workload generators including Bombardier and Wrk.

Two server workloads are supported:

• TechEmpower JSON Serialization
  Based on the ASP.NET Benchmarks project (derived from the TechEmpower framework), the server exposes a /json endpoint that serializes a simple JSON object. Supports Bombardier and Wrk as client load generators.
• OrchardCore CMS
  Runs the OrchardCore content management system with a Blog recipe, benchmarked with Wrk against the /about endpoint.

Both server configurations support CPU core affinity via the BindToCores and CoreAffinity parameters, allowing the server process to be pinned to specific CPU cores for controlled performance measurement.

• ASP.NET Benchmarks GitHub
• OrchardCore GitHub
• TechEmpower Framework Benchmarks
• Bombardier Documentation
• Wrk/Wrk2 Documentation

What is Being Measured?

The client tools (Bombardier, Wrk or Wrk2) generate concurrent HTTP requests against the ASP.NET server and capture latency percentile distributions and throughput statistics.

TechEmpower JSON Serialization

The server exposes a /json endpoint that serializes a simple JSON object. This scenario measures raw HTTP request processing performance of the Kestrel server with minimal application logic overhead.

Workload Metrics

The following metrics are examples of those captured by the Virtual Client when running the ASP.NET benchmark workloads.

Bombardier Metrics

The following metrics are emitted when the 'Bombardier' workload generator is used.

Name	Example Value	Unit	Description
Latency Average	133.3698688	milliseconds	Average HTTP response latency
Latency Max	7123.06304	milliseconds	Maximum HTTP response latency
Latency P50	83.39392	milliseconds	HTTP response latency (50th percentile)
Latency P75	160.14336	milliseconds	HTTP response latency (75th percentile)
Latency P90	286.4128	milliseconds	HTTP response latency (90th percentile)
Latency P95	367.4112	milliseconds	HTTP response latency (95th percentile)
Latency P99	637.534208	milliseconds	HTTP response latency (99th percentile)
RequestPerSecond Avg	32768.449018	Reqs/sec	ASP.NET Web Requests per second (average)
RequestPerSecond Stddev	6446.822354105378	Reqs/sec	ASP.NET Web Requests per second (standard deviation)
RequestPerSecond P50	31049.462844	Reqs/sec	ASP.NET Web Requests per second (P50)
RequestPerSecond P75	35597.436614	Reqs/sec	ASP.NET Web Requests per second (P75)
RequestPerSecond P90	39826.205746	Reqs/sec	ASP.NET Web Requests per second (P90)
RequestPerSecond P95	41662.542962	Reqs/sec	ASP.NET Web Requests per second (P95)
RequestPerSecond P99	48600.556224	Reqs/sec	ASP.NET Web Requests per second (P99)

Wrk Metrics

The following metrics are emitted when the 'Wrk' workload generator is used.

Name	Example Value	Unit	Description
latency_p50	1.427	milliseconds	HTTP response latency (50th percentile)
latency_p75	1.982	milliseconds	HTTP response latency (75th percentile)
latency_p90	2.683	milliseconds	HTTP response latency (90th percentile)
latency_p99	3.960	milliseconds	HTTP response latency (99th percentile)
latency_p99_9	6.930	milliseconds	HTTP response latency (99.9th percentile)
latency_p100	9.770	milliseconds	HTTP response latency (100th percentile)
requests/sec	16305.17	requests/sec	Aggregate throughput
transfers/sec	20.01	megabytes/sec	Data transfer rate