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364 lines (334 loc) · 12.1 KB
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using BenchmarkDotNet.Attributes;
using NpgsqlRest;
using NpgsqlTypes;
using System.Text;
namespace BenchmarkTests;
/// <summary>
/// Benchmarks for TypeCategory lookup and TypeDescriptor operations.
/// Tests the optimization of type dispatch in hot paths.
/// </summary>
[MemoryDiagnoser]
public class TypeCategoryBenchmarks
{
// Common PostgreSQL types for realistic benchmarking
private static readonly string[] CommonTypes =
[
"integer", "bigint", "text", "varchar", "boolean", "timestamp",
"timestamptz", "date", "numeric", "uuid", "jsonb", "bytea"
];
private TypeDescriptor[] _descriptors = null!;
private NpgsqlDbType[] _dbTypes = null!;
[GlobalSetup]
public void Setup()
{
// Create type descriptors for common types
_descriptors = CommonTypes.Select(t => new TypeDescriptor(t)).ToArray();
// Direct NpgsqlDbType values for lookup benchmarks
_dbTypes =
[
NpgsqlDbType.Integer, NpgsqlDbType.Bigint, NpgsqlDbType.Text,
NpgsqlDbType.Varchar, NpgsqlDbType.Boolean, NpgsqlDbType.Timestamp,
NpgsqlDbType.TimestampTz, NpgsqlDbType.Date, NpgsqlDbType.Numeric,
NpgsqlDbType.Uuid, NpgsqlDbType.Jsonb, NpgsqlDbType.Bytea,
NpgsqlDbType.Real, NpgsqlDbType.Double, NpgsqlDbType.Money,
NpgsqlDbType.Xml, NpgsqlDbType.Json, NpgsqlDbType.Char
];
}
/// <summary>
/// Benchmark: TypeCategory lookup via GetCategory
/// This is the core lookup operation used in hot paths.
/// </summary>
[Benchmark]
public TypeCategory TypeCategoryLookup_AllTypes()
{
TypeCategory result = TypeCategory.None;
foreach (var dbType in _dbTypes)
{
result |= TypeCategoryLookup.GetCategory(dbType);
}
return result;
}
/// <summary>
/// Benchmark: TypeDescriptor construction
/// Tests the cost of creating type descriptors at startup.
/// </summary>
[Benchmark]
public TypeDescriptor[] TypeDescriptor_Construction()
{
var result = new TypeDescriptor[CommonTypes.Length];
for (int i = 0; i < CommonTypes.Length; i++)
{
result[i] = new TypeDescriptor(CommonTypes[i]);
}
return result;
}
/// <summary>
/// Benchmark: Accessing Category property and doing bitwise checks
/// Simulates the hot path in result serialization.
/// </summary>
[Benchmark]
public int TypeDescriptor_CategoryBitwiseChecks()
{
int count = 0;
foreach (var descriptor in _descriptors)
{
// Simulate serialization hot path checks
if ((descriptor.Category & TypeCategory.Numeric) != 0) count++;
if ((descriptor.Category & TypeCategory.Boolean) != 0) count++;
if ((descriptor.Category & TypeCategory.Json) != 0) count++;
if ((descriptor.Category & TypeCategory.Text) != 0) count++;
if ((descriptor.Category & TypeCategory.DateTime) != 0) count++;
if ((descriptor.Category & TypeCategory.NeedsEscape) != 0) count++;
}
return count;
}
/// <summary>
/// Benchmark: Accessing individual boolean properties (backward compat)
/// Compares to using Category bitwise checks directly.
/// </summary>
[Benchmark]
public int TypeDescriptor_BooleanPropertyAccess()
{
int count = 0;
foreach (var descriptor in _descriptors)
{
// Using the backward-compatible boolean properties
if (descriptor.IsNumeric) count++;
if (descriptor.IsBoolean) count++;
if (descriptor.IsJson) count++;
if (descriptor.IsText) count++;
if (descriptor.IsDateTime) count++;
if (descriptor.NeedsEscape) count++;
}
return count;
}
/// <summary>
/// Benchmark: Combined check pattern used in serialization
/// (descriptor.IsNumeric || descriptor.IsBoolean || descriptor.IsJson)
/// </summary>
[Benchmark]
public int TypeDescriptor_CombinedCheck_Properties()
{
int count = 0;
foreach (var descriptor in _descriptors)
{
// Pattern used in NpgsqlRestEndpoint.cs serialization
if (descriptor.IsNumeric || descriptor.IsBoolean || descriptor.IsJson) count++;
if (descriptor.IsText || descriptor.IsDate || descriptor.IsDateTime) count++;
}
return count;
}
/// <summary>
/// Benchmark: Combined check using direct Category bitwise
/// </summary>
[Benchmark]
public int TypeDescriptor_CombinedCheck_Bitwise()
{
int count = 0;
foreach (var descriptor in _descriptors)
{
// Optimized pattern using bitwise
if ((descriptor.Category & (TypeCategory.Numeric | TypeCategory.Boolean | TypeCategory.Json)) != 0) count++;
if ((descriptor.Category & (TypeCategory.Text | TypeCategory.Date | TypeCategory.DateTime)) != 0) count++;
}
return count;
}
}
/// <summary>
/// Benchmarks for parameter parsing operations.
/// Tests the delegate lookup optimization vs original if-chain.
/// </summary>
[MemoryDiagnoser]
public class ParameterParserBenchmarks
{
private NpgsqlDbType[] _parseableTypes = null!;
private string[] _testValues = null!;
[GlobalSetup]
public void Setup()
{
_parseableTypes =
[
NpgsqlDbType.Integer, NpgsqlDbType.Bigint, NpgsqlDbType.Smallint,
NpgsqlDbType.Double, NpgsqlDbType.Real, NpgsqlDbType.Numeric,
NpgsqlDbType.Boolean, NpgsqlDbType.Timestamp, NpgsqlDbType.TimestampTz,
NpgsqlDbType.Date, NpgsqlDbType.Time, NpgsqlDbType.Uuid
];
_testValues =
[
"42", "9223372036854775807", "32767",
"3.14159", "2.71828", "123.456",
"true", "2024-01-15T10:30:00", "2024-01-15T10:30:00Z",
"2024-01-15", "10:30:00", "550e8400-e29b-41d4-a716-446655440000"
];
}
/// <summary>
/// Benchmark: GetParser delegate lookup
/// Tests the O(1) array lookup for parser delegates.
/// </summary>
[Benchmark]
public int ParameterParsers_GetParser_AllTypes()
{
int count = 0;
foreach (var dbType in _parseableTypes)
{
var parser = ParameterParsers.GetParser(dbType);
if (parser != null) count++;
}
return count;
}
/// <summary>
/// Benchmark: Full parse operation using delegate lookup
/// Simulates realistic parameter parsing workload.
/// </summary>
[Benchmark]
public int ParameterParsers_ParseValues()
{
int successCount = 0;
for (int i = 0; i < _parseableTypes.Length; i++)
{
var parser = ParameterParsers.GetParser(_parseableTypes[i]);
if (parser != null && parser(_testValues[i], out var result) && result != null)
{
successCount++;
}
}
return successCount;
}
}
/// <summary>
/// Benchmarks simulating realistic endpoint serialization workloads.
/// Tests the combined effect of all optimizations.
/// </summary>
[MemoryDiagnoser]
public class SerializationBenchmarks
{
private TypeDescriptor[] _columnDescriptors = null!;
private string[][] _rowData = null!;
private StringBuilder _outputBuffer = null!;
[Params(10, 100, 1000)]
public int RowCount { get; set; }
[GlobalSetup]
public void Setup()
{
// Typical result set: 10 columns of mixed types
_columnDescriptors =
[
new TypeDescriptor("integer"), // id
new TypeDescriptor("text"), // name
new TypeDescriptor("varchar"), // email
new TypeDescriptor("boolean"), // is_active
new TypeDescriptor("timestamptz"), // created_at
new TypeDescriptor("numeric"), // balance
new TypeDescriptor("jsonb"), // metadata
new TypeDescriptor("uuid"), // external_id
new TypeDescriptor("date"), // birth_date
new TypeDescriptor("bigint") // count
];
// Generate test data
_rowData = new string[RowCount][];
for (int i = 0; i < RowCount; i++)
{
_rowData[i] =
[
i.ToString(),
$"User {i}",
$"user{i}@example.com",
(i % 2 == 0) ? "t" : "f",
"2024-01-15 10:30:00+00",
$"{i * 100.50m}",
$"{{\"key\": {i}}}",
Guid.NewGuid().ToString(),
"2024-01-15",
(i * 1000L).ToString()
];
}
_outputBuffer = new StringBuilder(RowCount * 500);
}
/// <summary>
/// Benchmark: Simulates the type dispatch logic in serialization hot path.
/// This is the core operation that happens per-column per-row.
/// </summary>
[Benchmark]
public int Serialization_TypeDispatch_Simulation()
{
int operations = 0;
_outputBuffer.Clear();
for (int row = 0; row < RowCount; row++)
{
for (int col = 0; col < _columnDescriptors.Length; col++)
{
var descriptor = _columnDescriptors[col];
var value = _rowData[row][col];
// Simulate the type dispatch in NpgsqlRestEndpoint.cs lines 2114-2174
if ((descriptor.Category & (TypeCategory.Numeric | TypeCategory.Boolean | TypeCategory.Json)) != 0)
{
if ((descriptor.Category & TypeCategory.Boolean) != 0)
{
// Boolean conversion
if (value == "t") _outputBuffer.Append("true");
else if (value == "f") _outputBuffer.Append("false");
else _outputBuffer.Append(value);
}
else
{
// Numeric or JSON - append directly
_outputBuffer.Append(value);
}
operations++;
}
else if (descriptor.NeedsEscape)
{
// String that needs escaping
_outputBuffer.Append('"');
_outputBuffer.Append(value); // Simplified - real code escapes
_outputBuffer.Append('"');
operations++;
}
else if ((descriptor.Category & TypeCategory.DateTime) != 0)
{
// DateTime formatting
_outputBuffer.Append('"');
_outputBuffer.Append(value.Replace(' ', 'T'));
_outputBuffer.Append('"');
operations++;
}
else
{
// Default quoted
_outputBuffer.Append('"');
_outputBuffer.Append(value);
_outputBuffer.Append('"');
operations++;
}
if (col < _columnDescriptors.Length - 1)
_outputBuffer.Append(',');
}
_outputBuffer.AppendLine();
}
return operations;
}
/// <summary>
/// Benchmark: Just the category lookup portion of serialization.
/// Isolates the optimization impact.
/// </summary>
[Benchmark]
public int Serialization_CategoryLookup_Only()
{
int matches = 0;
for (int row = 0; row < RowCount; row++)
{
for (int col = 0; col < _columnDescriptors.Length; col++)
{
var descriptor = _columnDescriptors[col];
// Just the category checks
if ((descriptor.Category & (TypeCategory.Numeric | TypeCategory.Boolean | TypeCategory.Json)) != 0)
matches++;
else if ((descriptor.Category & TypeCategory.NeedsEscape) != 0)
matches++;
else if ((descriptor.Category & TypeCategory.DateTime) != 0)
matches++;
}
}
return matches;
}
}
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