[FB-Tracker] Created: (DNET-1042) Performance regression between 7.10.1 and 8.0.1

[Rand Random (JIRA)]

Performance regression between 7.10.1 and 8.0.1
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Key: DNET-1042
URL: http://tracker.firebirdsql.org/browse/DNET-1042
Project: .NET Data provider
Issue Type: Bug
Components: ADO.NET Provider
Affects Versions: 8.0.1.0
Environment: Win10, FB 3.0.7
Reporter: Rand Random
Assignee: Jiri Cincura


The performance to read data dropped to half between 7.10.1 and 8.0.1.
On 7.10.1 my test finishes with 11.14 s.
On 8.0.1 my test finishes with 28.72 s.

I have created this github project with the code demonstrating my issue
https://github.com/Rand-Random/FbPerf

Only this file contains code:
https://github.com/Rand-Random/FbPerf/blob/main/FbPerf8/FbPerfTest.cs

This *.cs file reads 1 million rows from a database containing 5 million records.
You can find the used database 7-zipped as TESTPERF.7z in the root of the github project, the file FbPerfTest.cs also contains code how I created/filled the test database, in case it is relevent.

The C# project FbPerf7 has the NuGet package for 7.10.1, while the C# project FbPerf8 has the NuGet package version 8.0.1.
I am using BenchmarkDotNet for the performance tests, I added the results as images into the root of the github project.
The perf7.jpg contains the result for the FbPerf7 C# project, and the perf8.jpg for the FbPerf8 C# project.

Please be aware of the fact that the folder FbPerf7 only contains the *.csproj file and not a single *.cs file, this is because I am linking existing files from the FbPerf8 folder, I do this to avoid writing the test twice.

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