graphql-python / graphql-python/graphql-core
Performance issues related to complete_value on large datasets
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Mô tả
Hi! We've noticed that returning a list of 5k elements, with a couple of nested objects is pretty slow:
```
Person {
id
name
lastname
age
address {street number}
job {id org_name}
partner {id name}
pets {name type}
school {id name}
}
```
ncalls | tottime | percall | cumtime | percall | filename:lineno(function)
-- | -- | -- | -- | -- | --
1 | 1.8e-05 | 1.8e-05 | 2.145 | 2.145 | graphql.py:103(graphql_sync)
1 | 1.5e-05 | 1.5e-05 | 2.145 | 2.145 | graphql.py:152(graphql_impl)
1/30001 | 0.19 | 6.335e-06 | 2.137 | 7.122e-05 | execute.py:413(ExecutionContext.execute_fields)
1 | 1.3e-05 | 1.3e-05 | 2.137 | 2.137 | execute.py:965(execute)
1 | 7e-06 | 7e-06 | 2.137 | 2.137 | execute.py:328(ExecutionContext.execute_operation)
1/135001 | 0.3229 | 2.392e-06 | 2.135 | 1.581e-05 | execute.py:485(ExecutionContext.execute_field)
1/145001 | 0.2737 | 1.888e-06 | 2.071 | 1.428e-05 | execute.py:575(ExecutionContext.complete_value)
1 | 0.009884 | 0.009884 | 2.071 | 2.071 | execute.py:660(ExecutionContext.complete_list_value)
**5000/30000** | 0.02747 | 9.156e-07 | 2.026 | 6.752e-05 | execute.py:893(ExecutionContext.complete_object_value)
By itself it's not really a slow function, but its executed 30k times. Is there any way to reduce the overhead by reducing the number of times this function is invoked?
Tested on Python 3.8 and graphql-core==3.2.3
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