League\OpenAPIValidation\Schema\SchemaValidator::validate latency multiplies on every call on response validator

[mpviau]

Hi,

I don't have much details regarding the exact cause, and I'd appreciate your help identifying it. We have a service running on OpenSwoole, and we are seeing requests becoming slower and slower as more requests are coming in. Every single time we need to validate a response, it adds more lag than the previous validation.

I traced down the source to something happening in League\OpenAPIValidation\Schema\SchemaValidator::validate, called from BodyValidator.

I suspect something stateful somewhere. I will provide more details as I find out more.