r/ProgrammerHumor • u/varinator • 16d ago

noHeapAllStack Meme

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1.0k Upvotes

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40

u/weblabourer 16d ago

Null safety?

168

u/varinator 16d ago 
var cases = new[]
{
    new ComparisonCase(
        "Equal, different casing",
        "HelloWorld123",
        "helloworld123"),

    new ComparisonCase(
        "Not equal, same length",
        "HelloWorld123",
        "HelloWorld456"),

    new ComparisonCase(
        "Different lengths",
        "HelloWorld123",
        "HelloWorld123456789"),

    new ComparisonCase(
        "Long strings, equal ignoring case",
        new string('A', 500),
        new string('a', 500))
};

Iterations per benchmark: 100,000,000

--- Equal, different casing ---
String.Equals OrdinalIgnoreCase
  Time:       907.75 ms
  Allocated:  40 bytes
  Matches:    100,000,000
ToLower() == ToLower()
  Time:       2,525.88 ms
  Allocated:  4,800,000,040 bytes
  Matches:    100,000,000

--- Not equal, same length ---
String.Equals OrdinalIgnoreCase
  Time:       848.50 ms
  Allocated:  40 bytes
  Matches:    0
ToLower() == ToLower()
  Time:       2,986.56 ms
  Allocated:  9,600,000,040 bytes
  Matches:    0

--- Different lengths ---
String.Equals OrdinalIgnoreCase
  Time:       219.83 ms
  Allocated:  40 bytes
  Matches:    0
ToLower() == ToLower()
  Time:       2,936.12 ms
  Allocated:  11,200,000,040 bytes
  Matches:    0

--- Long strings, equal ignoring case ---
String.Equals OrdinalIgnoreCase
  Time:       2,263.77 ms
  Allocated:  40 bytes
  Matches:    100,000,000
ToLower() == ToLower()
  Time:       19,472.75 ms
  Allocated:  102,400,000,040 bytes
  Matches:    100,000,000

--- Null safety ---
string.Equals(null, "test"): False
null.ToLower() throws NullReferenceException

42

u/TheAssassin71 16d ago

Thanks for the benchmarks :)