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This repository contains test code that demonstrates some of the NHibernate features and can be used for basic perfornace profiling.

Important note: all performance tests results are relative! You might get totally diffrent results on different computers.

Testing description

  • Every scenario runs 10 times (i.e., 510 rows scenario actually retrieves 5100 rows in total)
  • Warmup is performed before first scenario execution in order to allow SQL Server to cache data into RAM
  • Total execution time of 10 scenario executions is recorded (i.e., warm up phase is not included)
  • Simple entities contain only base types like bool, DateTime, int, string
  • Complex entities contain base types like bool, DateTime, int, string and references to other entities
  • Only selects are performed

Results:

June, 2016

Hardware & Software:

  • DELL XPS 17
  • 16 GB RAM
  • Intel 335 Series 2.5-Inch 240GB SATA3 Solid State Drive SSDSC2CT240A4K5
  • CPU Intel Core i7-2670QM
  • Windows 7 Ultimate, 64-bit, SP1
  • Microsoft SQL Server Express Edition (64-bit), Version 10.50.4042.0 (runs locally)
  • Redis 2.8.4 (runs on local VMware virtual machine, Ubuntu 14.04.3 LTS 64-bit; swap is disabled; 4 GB RAM; 4 cores are available)
  • CLRProfiler 4.5 for memory consumption testing

Components used:

  • FluentNHibernate: 2.0.3
  • NHibernate: 4.0.4.4000
  • Newtonsoft.Json: 8.0.3
  • NHibernate.Caches.Redis: 2.0.0
  • NHibernate.Caches.StackExchange.Redis: 0.0.2
  • NHibernate.Caches.RtMemoryCache: 4.0.0.4000
  • NHibernate.Caches.SysCache2: 4.0.0.4000
  • StackExchange.Redis: 1.0.371

Important notes

  • FluentNHibernate is used for mappings

Simple entities retrieval / Performance

510 rows without cache 54784 rows without cache 510 rows with cache 54784 rows with cache (1)
ADO.NET 00:00:03.68 00:00:09.54 Not implemented Not implemented
NH statefull 00:00:03.73 00:00:20.18 - -
NH statefull / RtCache - - 00:00:00.43 00:00:08.87
NH statefull / SysCache - - 00:00:00.46 00:00:08.53
NH statefull / Redis - - 00:00:04.55 Took too much time
NH statefull / Redis+JSON (2) - - 00:00:05.44 Took too much time
NH stateless 00:00:03.67 00:00:17.94 Cache not used Cache not used

Complex entities retrieval / Performance

510 rows without cache 54784 rows without cache 510 rows with cache 54784 rows with cache (1)
ADO.NET 00:00:03.62 00:00:10.35 Not implemented Not implemented
NH statefull 00:00:03.63 00:00:34.12 - -
NH statefull / RtCache - - 00:00:00.52 00:00:16.73
NH statefull / SysCache - - 00:00:00.51 00:00:16.13
NH statefull / Redis - - 00:00:07.13 Took too much time
NH statefull / Redis+JSON (2) - - Took too much time
NH stateless 00:00:03.95 00:00:47.17 Cache not used Cache not used

Simple entities retrieval / Memory consumption (in bytes)

  • Each scenario executed 5 times
  • Memory consumption is calculated based on "Heap Statistics -> Allocated bytes" value that shows total allocated memory including memory allocated by CLR
510 rows without cache 54784 rows without cache 510 rows with cache 54784 rows with cache (1)
ADO.NET 1 481 765 105 596 943 Not implemented Not implemented
NH statefull (3) 17 886 507 457 529 741 - -
NH statefull / RtCache (3) - - 19 026 015 575 219 295
NH statefull / SysCache (3) - - 19 117 331 587 477 658
NH statefull / Redis (3) - - 94 010 583 Took too much time
NH statefull / Redis+JSON (2) (3) - - 44 870 931 Took too much time
NH stateless (3) 17 129 099 377 538 871 Cache not used Cache not used
  1. Never perform large SELECTs on production system with distributed cache
  2. JSON serializer was copied from the suggested source: https://gist.github.com/TheCloudlessSky/f60d47ad2ca4dea72583
  3. Around 8 MB of memory is consumed by FluentNHibernate mappings because it builds HBM XML that is then used by NHibernate to build actual mappings