--- title: "Technical Guide: .NET Core FIX Engine SDK with one million FIX messages and zero Garbage Collection" description: Garbage Collection GC Load Testing OnixS FIX Engine .NET Core SDK using built-in .NET API. image: https://www.onixs.biz/hubfs/Garbage%20Collection%20GC%20Load%20Testing.jpeg --- [OnixS ](https://www.onixs.biz/) - [Products](https://www.onixs.biz/products.html) - [Support](https://www.onixs.biz/support.html) - [Contact us](https://www.onixs.biz/contact-us) Search Menu ![News icon](https://www.onixs.biz/hubfs/SIC_website_2020/images/interface/img-icon-globe.svg) # Technical Guide: .NET Core FIX Engine SDK with one million FIX messages and zero Garbage Collection - [Home](https://www.onixs.biz) - [Insights](https://www.onixs.biz/insights/) [← Back to article listing](https://www.onixs.biz/insights/) --- December 8, 2021 Share this *Garbage Collection(GC) induced latency in trading applications can be a major problem. OnixS shows how to measure the GC load of the OnixS FIX Engine .NET Core SDK using the built-in .NET API demonstrating zero GC load.* ### Measuring and avoiding GC in the critical path When GC blocks working threads, the latency increases dramatically and you don’t know when it’s going to hit. For performance-critical applications it is preferable to avoid garbage collection by using software designed not to allocate memory in the critical path. And very importantly to verify that it doesn’t. This [article shows how OnixS measures GC using the built-in .NET API](https://ref.onixs.biz/garbage-collection-load-testing-dotnet.html), and describes its usage to test the GC load of the OnixS [ultra-low latency .NET Core FIX Engine](https://www.onixs.biz/net-core-fix-engine.html) to send and receive one million FIX messages without producing any GC load. [You can read the full technical reference here](https://ref.onixs.biz/garbage-collection-load-testing-dotnet.html). Or, learn more about the [OnixS .NET Core FIX Engine / .NET 5 FIX Engine here](https://www.onixs.biz/net-core-fix-engine.html). ### Request An Evaluation Download or Demo Request a free [30-day evaluation download or a hands-on demonstration](https://www.onixs.biz/net-core-fix-engine.html#Download) walk through.   [![Is your FIX Engine specifically designed for ultra-low latency, high-frequency trading infrastructure?](https://no-cache.hubspot.com/cta/default/2054176/1a3ffcbd-ce34-41fb-8de6-f91b67ee25f8.png)](https://cta-redirect.hubspot.com/cta/redirect/2054176/1a3ffcbd-ce34-41fb-8de6-f91b67ee25f8) ### Other recent related articles [Read the full article' ](https://www.onixs.biz/insights/onixs-dora-ready-advantage) ##### [ The OnixS DORA-ready advantage ](https://www.onixs.biz/insights/onixs-dora-ready-advantage) April 29, 2026 [Read the full article' ](https://www.onixs.biz/insights/java-fix-how-long-to-send-one-million-fix-messages) ##### [ Technical Guide: How long does it take to send One Million FIX messages using Java? ](https://www.onixs.biz/insights/java-fix-how-long-to-send-one-million-fix-messages) January 8, 2025 [Read the full article' ](https://www.onixs.biz/insights/the-anatomy-of-fix-protocol-messages) ##### [ The anatomy of FIX Protocol messages ](https://www.onixs.biz/insights/the-anatomy-of-fix-protocol-messages) August 7, 2024 [Read the full article' ](https://www.onixs.biz/insights/understanding-fix-drop-copy-in-financial-trading) ##### [ Understanding FIX drop copy in financial trading ](https://www.onixs.biz/insights/understanding-fix-drop-copy-in-financial-trading) July 10, 2024 [Read the full article' ](https://www.onixs.biz/insights/what-is-high-frequency-trading) ##### [ What is high frequency trading? ](https://www.onixs.biz/insights/what-is-high-frequency-trading) September 1, 2023 [![Is your FIX Engine specifically designed for ultra-low latency, high-frequency trading infrastructure?](https://no-cache.hubspot.com/cta/default/2054176/0861645e-e643-40f5-b411-57be29ed7d1a.png)](https://cta-redirect.hubspot.com/cta/redirect/2054176/0861645e-e643-40f5-b411-57be29ed7d1a) - Follow OnixS - [Follow us on Twitter ](https://twitter.com/onixsbiz) - [Connect with us on LinkedIn ](https://www.linkedin.com/company/onix-solutions/) [OnixS ](https://www.onixs.biz/) - [Follow us on Twitter ](https://twitter.com/onixsbiz) - [Connect with us on LinkedIn ](https://www.linkedin.com/company/onix-solutions/) ###### Telephone UK [ +44 20 7117 0111 ](tel:+44-20-7117-0111) ###### Telephone US [ +1 312 999 6040 ](tel:+1-312-999-6040) ###### Sales Support [ sales@onixs.biz ](mailto:sales@onixs.biz) ###### Technical Support [ support@onixs.biz ](mailto:support@onixs.biz) [ Support ](https://www.onixs.biz/support.html) - [Products](https://www.onixs.biz/products.html) - [OnixS directConnect](https://www.onixs.biz/directconnect.html) - [FIX Engine](https://www.onixs.biz/fix-engine.html) - [FIX Protocol Tools](https://www.onixs.biz/fix-protocol-dictionary-tools.html) - [About OnixS](https://www.onixs.biz/about.html) - [Insights](https://www.onixs.biz/insights) - [Contact us](https://www.onixs.biz/contact-us) - [Privacy](https://www.onixs.biz/cookies-and-privacy.html) - [Sitemap](https://www.onixs.biz/sitemap.html) Copyright © 2026 OnixS. All Rights Reserved. We track how people interact with our online web content and resources, and some of that tracking involves storing cookies on your device. By continuing to use our site you accept that you agree to this. For more details see our [Cookie usage, and Data Privacy and Protection Policies](https://www.onixs.biz/cookies-and-privacy.html). [Ok](https://www.onixs.biz/insights/zero-gc-fix-engine#) [OnixS ](https://www.onixs.biz/) Menu - Products - [Products Overview](https://www.onixs.biz/products.html) - [directConnect](https://www.onixs.biz/directconnect.html) - [directConnect SDKs](https://www.onixs.biz/directconnect.html) - [Bloomberg TSOX](https://www.onixs.biz/bloomberg-tsox.html) - [Cboe CFE](https://www.onixs.biz/cboe.html) - [Cboe EU](https://www.onixs.biz/cboe-europe.html) - [CME Globex](https://www.onixs.biz/cme.html) - [CME BrokerTec](https://www.onixs.biz/cme-brokertec.html) - [CME EBS](https://www.onixs.biz/cme-ebs.html) - [Deutsche Börse RRH](https://www.onixs.biz/deutsche-borse-regulatory-reporting-hub-fix.html) - [ICE (Intercontinental Exchange)](https://www.onixs.biz/ice-exchange.html) - [LME (London Metals Exchange)](https://www.onixs.biz/lme.html) - [LSE (London Stock Exchange)](https://www.onixs.biz/lse.html) - [MTS Markets](https://www.onixs.biz/mts.html) - [Nasdaq NFI](https://www.onixs.biz/nasdaq-nfi.html) - [Nodal Exchange](https://www.onixs.biz/nodal-exchange-fix-trade-capture.html) - [TRADEcho](https://www.onixs.biz/tradecho.html) - [TT® 7x FIX](https://www.onixs.biz/tt-7x.html) - [TT® Platform](https://www.onixs.biz/tt.html) - [Turquoise](https://www.onixs.biz/turquoise-dropcopy.html) - [FIX Engine](https://www.onixs.biz/fix-engine.html) - [FIX Engine SDKs](https://www.onixs.biz/fix-engine.html) - [.NET Core/.NET FIX Engine](https://www.onixs.biz/net-fix-engine.html) - [.NET Framework / C# FIX Engine](https://www.onixs.biz/net-framework-fix-engine.html) - [C++ FIX Engine](https://www.onixs.biz/cpp-fix-engine.html) - [Java FIX Engine](https://www.onixs.biz/java-fix-engine.html) - [FIX FAST Decoder and Encoder](https://www.onixs.biz/fix-fast-decoder-encoder.html) - [FIX <-> FIXML Converter](https://www.onixs.biz/fix-fixml-converter.html) - [FIX Protocol Reference & Tools](https://www.onixs.biz/fix-protocol-dictionary-tools.html) - [Reference & Tools Overview](https://www.onixs.biz/fix-protocol-dictionary-tools.html) - [SBE Decoder and Encoder](https://www.onixs.biz/sbe-decoder-encoder.html) - [FIX Protocol Overview](https://www.onixs.biz/fix-protocol.html) - [FIXP Overview](https://www.onixs.biz/fixp.html) - [FIX Dictionary](https://www.onixs.biz/fix-dictionary.html) - [FIX Analyser](https://www.onixs.biz/fix-analyser.html) - [About OnixS](https://www.onixs.biz/about.html) - [Insights](https://www.onixs.biz/insights) - [Contact us](https://www.onixs.biz/contact-us) --- - [Support](https://www.onixs.biz/support.html) --- - [Privacy](https://www.onixs.biz/cookies-and-privacy.html) - [Sitemap](https://www.onixs.biz/sitemap.html) [OnixS ](https://www.onixs.biz/) Close Search ### Search the site Search