Fixed read conditions in IOperationDocumentStorage implementations

[glen-84]

Summary of the changes (Less than 80 chars)

• Fixed read conditions in IOperationDocumentStorage implementations.

[github-actions]

🚀 Fusion Gateway Performance Results

Simple Composite Query

Constant Load (50 VUs)

Requests/sec	Error Rate
5806.30 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.78ms	7.13ms	162.71ms	8.46ms	13.01ms	18.76ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
4516.45 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.84ms	38.84ms	245.94ms	49.04ms	110.18ms	126.78ms

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
267.44 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
12.65ms	175.15ms	590.40ms	181.22ms	225.12ms	250.94ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
296.31 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
3.11ms	709.64ms	1661.18ms	710.57ms	1433.15ms	1505.00ms

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
24105.26 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	1.67ms	45.68ms	2.02ms	3.84ms	4.71ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
18763.29 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	9.21ms	107.37ms	11.24ms	23.17ms	28.09ms

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 21359887396 • Commit ecc3be9 • Mon, 26 Jan 2026 14:03:19 GMT

[Copilot]

Pull request overview

This pull request fixes critical bugs in stream reading logic across two IOperationDocumentStorage implementations. The changes correct improper end-of-stream detection that could cause incorrect behavior when reading persisted GraphQL operation documents.

Changes:

• Fixed FileSystemOperationDocumentStorage to use the correct stream reading pattern (checking for read != 0 instead of read == chunkSize)
• Fixed AzureBlobOperationDocumentStorage to properly detect EOF (checking for read == 0 instead of read < 256) and modernized to use Memory API
• Both changes eliminate bugs where the old code made incorrect assumptions about Stream.ReadAsync behavior

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
FileSystemOperationDocumentStorage.cs	Corrected stream reading loop to check for EOF properly and removed unnecessary initialization of read variable
AzureBlobOperationDocumentStorage.cs	Fixed EOF detection logic and modernized to use Memory-based ReadAsync overload

---

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (e92dbb7) to head (9e86641).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@     Coverage Diff      @@
##   main   #9064   +/-   ##
============================
============================

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[github-actions]

🚀 Fusion Gateway Performance Results

Simple Composite Query

Constant Load (50 VUs)

Requests/sec	Error Rate
5768.60 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.80ms	7.16ms	163.39ms	8.51ms	13.30ms	18.80ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
4630.95 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.81ms	38.18ms	272.14ms	47.84ms	105.35ms	126.08ms

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
269.93 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
13.00ms	174.88ms	612.17ms	179.64ms	224.26ms	247.17ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
301.57 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
3.09ms	664.32ms	1710.73ms	700.71ms	1415.35ms	1505.15ms

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
23604.40 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	1.71ms	44.09ms	2.07ms	3.92ms	4.80ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
18912.43 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	9.11ms	109.90ms	11.19ms	23.08ms	27.90ms

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 21432329220 • Commit b1bd3db • Wed, 28 Jan 2026 10:03:19 GMT