Benchmarking various ways to get last item from collection (list, array)
In this demo, i m using BenchmarkDotNet library in order to benchmark various ways of finding last item in a collection (list, array) :
1️⃣ Using linq
2️⃣ Using indexes
3️⃣ Using Ranges
In order to run benchmarks, type these commands in your favorite terminal :
✍️
.\App.exe --filter LastListItemBench✍️
.\App.exe --filter LastArrayItemBench
| Method | Size | Mean | Error | StdDev | Min | Max | Rank | Allocated |
|----------- |------- |-----------:|----------:|----------:|-----------:|-----------:|-----:|----------:|
| UsingRange | 1000 | 0.1868 ns | 0.0323 ns | 0.0302 ns | 0.1434 ns | 0.2393 ns | 1 | - |
| UsingIndex | 1000 | 0.2807 ns | 0.0329 ns | 0.0308 ns | 0.2430 ns | 0.3423 ns | 2 | - |
| UsingLinq | 1000 | 22.9925 ns | 0.4925 ns | 0.5058 ns | 22.4384 ns | 24.1473 ns | 3 | - |
| | | | | | | | | |
| UsingRange | 10000 | 0.2131 ns | 0.0138 ns | 0.0129 ns | 0.1921 ns | 0.2282 ns | 1 | - |
| UsingIndex | 10000 | 0.3064 ns | 0.0344 ns | 0.0460 ns | 0.2255 ns | 0.4187 ns | 2 | - |
| UsingLinq | 10000 | 23.5613 ns | 0.2234 ns | 0.2090 ns | 23.3008 ns | 23.9098 ns | 3 | - |
| | | | | | | | | |
| UsingIndex | 100000 | 0.1767 ns | 0.0127 ns | 0.0119 ns | 0.1504 ns | 0.1999 ns | 1 | - |
| UsingRange | 100000 | 0.2450 ns | 0.0389 ns | 0.0382 ns | 0.2029 ns | 0.3349 ns | 2 | - |
| UsingLinq | 100000 | 22.9341 ns | 0.1171 ns | 0.0977 ns | 22.6640 ns | 23.0190 ns | 3 | - |
Tools : vs19, net 5.0