Benchmarks

If you want to check the benchmarks by yourself, git clone https://github.com/ncalc/ncalc, open the solution and run NCalc.Benchmarks at Release mode.

Legends

Mean : Arithmetic mean of all measurements Error : Half of 99.9% confidence interval StdDev : Standard deviation of all measurements Rank : Relative position of current benchmark mean among all benchmarks (Arabic style) Gen0 : GC Generation 0 collects per 1000 operations Gen1 : GC Generation 1 collects per 1000 operations Allocated : Allocated memory per single operation (managed only, inclusive, 1KB = 1024B) 1 us : 1 Microsecond (0.000001 sec)

Parlot vs Antlr

This is a benchmark of the default parser of NCalc v4+ vs the Antlr plugin (default parser of older versions).

BenchmarkDotNet v0.13.12, Ubuntu 22.04.4 LTS (Jammy Jellyfish) AMD EPYC 7763, 1 CPU, 4 logical and 2 physical cores .NET SDK 8.0.303 [Host] : .NET 8.0.7 (8.0.724.31311), X64 RyuJIT AVX2 DefaultJob : .NET 8.0.7 (8.0.724.31311), X64 RyuJIT AVX2

Method	Mean	Error	StdDev	Rank	Gen0	Allocated
SimpleParlotExpression	7.117 μs	0.0553 μs	0.0490 μs	1	-	1.02 KB
SimpleAntlrExpression	11.420 μs	0.0582 μs	0.0454 μs	2	0.1526	13.38 KB
AdvancedParlotExpression	19.016 μs	0.0922 μs	0.0817 μs	3	0.0305	2.51 KB
AdvancedAntlrExpression	34.538 μs	0.1062 μs	0.0887 μs	4	0.4272	38.47 KB

Evaluate vs Lambda

This showcase how lambda expressions are faster than manually evaluating the expression and why you should cache the lambda instead of manually compiling everytime.

Method	Mean	Error	StdDev	Rank	Gen0	Allocated
LambdaWithoutCompilation	0.3045 ns	0.0123 ns	0.0115 ns	1	-	-
Evaluate	705.6432 ns	2.7688 ns	2.1617 ns	2	0.0200	1680 B
LambdaWithCompilation	22,926.9179 ns	161.2515 ns	142.9452 ns	3	-	4992 B

NCalc vs DataTable

DataTable.Compute it's the only way to evaluate expressions at .NET without a third-party library.

BenchmarkDotNet v0.14.0, Ubuntu 24.04 LTS (Noble Numbat) AMD Ryzen 5 3600, 1 CPU, 12 logical and 6 physical cores .NET SDK 8.0.108 [Host] : .NET 8.0.8 (8.0.824.36612), X64 RyuJIT AVX2 DefaultJob : .NET 8.0.8 (8.0.824.36612), X64 RyuJIT AVX2

Method	Mean	Error	StdDev	Median	Rank	Gen0	Allocated
EvaluateNCalc	1.463 us	0.0292 us	0.0671 us	1.434 us	1	0.2766	2.27 KB
EvaluateDataTable	4.438 us	0.0295 us	0.0276 us	4.440 us	2	0.6790	5.58 KB

Parlot parser compilation

Parlot parser, which is used as a default parser in NCalc, supports parser compilation. It can improve the performance by 20%. You can find the benchmark results in Parlot repository. By default, it is disabled in NCalc, you can enable it by using AppContext switch: