Updated .NET regular expressions to use \z instead of $

[glen-84]

Summary of the changes (Less than 80 chars)

• Updated .NET regular expressions to use \z instead of $.

---

Merge after #8931.

[github-actions]

🚀 Fusion Gateway Performance Results

Simple Composite Query

Constant Load (50 VUs)

Requests/sec	Error Rate
5957.23 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.78ms	6.98ms	160.15ms	8.25ms	12.64ms	18.18ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
4600.72 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.78ms	37.66ms	232.19ms	48.26ms	109.30ms	127.20ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
      }
    }
  }
}

Deep Recursion Query

Constant Load (50 VUs)

Requests/sec	Error Rate
271.64 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
13.21ms	173.02ms	602.48ms	178.47ms	226.23ms	249.42ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
305.49 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
3.05ms	659.59ms	1692.77ms	688.73ms	1381.25ms	1468.43ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  users {
    ...User
    reviews {
      ...Review
      product {
        ...Product
        reviews {
          ...Review
          author {
            ...User
            reviews {
              ...Review
              product {
                ...Product
              }
            }
          }
        }
      }
    }
  }
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
        reviews {
          ...Review
          product {
            ...Product
          }
        }
      }
    }
  }
}

Variable Batching Throughput

Constant Load (50 VUs)

Requests/sec	Error Rate
23867.17 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	1.69ms	49.33ms	2.04ms	3.89ms	4.76ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
18718.24 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	9.13ms	105.89ms	11.26ms	23.47ms	28.28ms

Executed Query

query TestQuery_8f7a46ce_2(
  $__fusion_1_upc: ID!
  $__fusion_2_price: Long!
  $__fusion_2_weight: Long!
) {
  productByUpc(upc: $__fusion_1_upc) {
    inStock
    shippingEstimate(weight: $__fusion_2_weight, price: $__fusion_2_price)
  }
}

Variables (5 sets batched in single request)

[
  { "__fusion_1_upc": "1", "__fusion_2_price": 899, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "2", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 },
  { "__fusion_1_upc": "3", "__fusion_2_price": 15, "__fusion_2_weight": 20 },
  { "__fusion_1_upc": "4", "__fusion_2_price": 499, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "5", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 }
]

No baseline data available for comparison.

---

Run 20597666729 • Commit c0d4bd3 • Tue, 30 Dec 2025 13:58:42 GMT

[Copilot]

Pull request overview

Updates scalar validation regex patterns in HotChocolate’s .NET implementation to use \z instead of $ for end-of-string anchoring, tightening validation so inputs with trailing newlines don’t match.

Changes:

• Replaced $ with \z in multiple scalar validation regex patterns.
• Converted several patterns to verbatim string literals (@"...") to simplify escaping.
• Updated the RegexTypeTests stub pattern accordingly.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/HotChocolate/Core/test/Types.Scalars.Tests/RegexTypeTests.cs	Updates test stub regex pattern to use \z.
src/HotChocolate/Core/src/Types.Scalars/PhoneNumberType.cs	Tightens E.164 phone validation by anchoring with \z.
src/HotChocolate/Core/src/Types.Scalars/MacAddressType.cs	Tightens MAC address validation end anchor to \z.
src/HotChocolate/Core/src/Types.Scalars/LongitudeType.cs	Updates sexagesimal parsing regex to use \z and verbatim strings.
src/HotChocolate/Core/src/Types.Scalars/LatitudeType.cs	Updates sexagesimal parsing regex to use \z and verbatim strings.
src/HotChocolate/Core/src/Types.Scalars/IsbnType.cs	Updates complex ISBN validation regex to use \z (including lookaheads).
src/HotChocolate/Core/src/Types.Scalars/IPv6Type.cs	Replaces final $ anchor with \z in IPv6(+CIDR) validation.
src/HotChocolate/Core/src/Types.Scalars/IPv4Type.cs	Replaces final $ anchor with \z and switches to verbatim strings.
src/HotChocolate/Core/src/Types.Scalars/HexColorType.cs	Tightens hex color validation end anchor to \z.
src/HotChocolate/Core/src/Types.Scalars/EmailAddressType.cs	Tightens email validation end anchor to \z and switches to verbatim strings.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

The switch from $ to \z changes matching semantics (values with a trailing newline will no longer match). Consider adding an explicit negative test case (e.g., a valid value plus \n / \r\n) to lock in the intended behavior and prevent regressions.

[github-actions]

🚀 Fusion Gateway Performance Results

Simple Composite Query

Constant Load (50 VUs)

Requests/sec	Error Rate
25208.30 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	1.60ms	45.47ms	1.94ms	3.63ms	4.50ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
19585.79 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	8.42ms	118.12ms	10.70ms	22.52ms	27.35ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
      }
    }
  }
}

Deep Recursion Query

Constant Load (50 VUs)

Requests/sec	Error Rate
24698.74 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	1.63ms	45.03ms	1.98ms	3.74ms	4.60ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
19218.57 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	8.68ms	113.35ms	10.96ms	22.92ms	28.01ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  users {
    ...User
    reviews {
      ...Review
      product {
        ...Product
        reviews {
          ...Review
          author {
            ...User
            reviews {
              ...Review
              product {
                ...Product
              }
            }
          }
        }
      }
    }
  }
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
        reviews {
          ...Review
          product {
            ...Product
          }
        }
      }
    }
  }
}

Variable Batching Throughput

Constant Load (50 VUs)

Requests/sec	Error Rate
27849.20 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.08ms	1.44ms	37.83ms	1.75ms	3.30ms	4.05ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
22102.77 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.08ms	6.96ms	104.61ms	9.31ms	19.87ms	24.21ms

Executed Query

query TestQuery_8f7a46ce_2(
  $__fusion_1_upc: ID!
  $__fusion_2_price: Long!
  $__fusion_2_weight: Long!
) {
  productByUpc(upc: $__fusion_1_upc) {
    inStock
    shippingEstimate(weight: $__fusion_2_weight, price: $__fusion_2_price)
  }
}

Variables (5 sets batched in single request)

[
  { "__fusion_1_upc": "1", "__fusion_2_price": 899, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "2", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 },
  { "__fusion_1_upc": "3", "__fusion_2_price": 15, "__fusion_2_weight": 20 },
  { "__fusion_1_upc": "4", "__fusion_2_price": 499, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "5", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 }
]

No baseline data available for comparison.

---

Run 21800807056 • Commit 832c269 • Sun, 08 Feb 2026 15:59:53 GMT