THREESCALE-12133 optimize configuration reload (2.16) #1571
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Previously, every time the policy chain was rebuilt, the gateway would look for the manifests file on the disk. This caused a delay for incoming requests. Since the manifests are static and do not change at runtime, it is more efficient to cache them at the module level. This caching will speed up the lookup process.
Creating a json schema validator is somewhat expensive, so we cache this step with a local LRU cache
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What
Backport #1564