aa0d7c73f8
The IndexAndAliasesResolver resolves the indices and aliases for each request and also handles local and remote indices. The current implementation uses the ResolvedIndices class to hold the resolved indices and aliases. While evaluating the indices and aliases against the user's permissions, the final value for ResolvedIndices is constructed. Prior to this change, this was done by creating a ResolvedIndices for the first set of indices and for each additional addition, a new ResolvedIndices object is created and merged with the existing one. With a small number of indices and aliases this does not pose a large problem; however as the number of indices/aliases grows more list allocations and array copies are needed resulting in a large amount of garbage and severely impacted performance. This change introduces a builder for ResolvedIndices that appends to mutable lists until the final value has been constructed, which will ultimately reduce the amount of garbage generated by this code. |
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