deserializeSafeFromHeader uses context.getHeader(headerName) instead of context.getHeaders()
#2767
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…ead of `context.getHeaders()` Signed-off-by: Paras Jain <parasjaz@amazon.com>
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Description
Category: Performance Bug Fix
Why these changes are required?
HeaderHelper.deserializeSafeFromHeaderis invoked O(segment) times during every search request and introduced a huge overhead. This optimisation has resulted in good gains with respect to search throughput and latency in our experiments.Issues Resolved
HeaderHelper.getSafeFromHeaderuses ThreadContext.getHeaders() causing major performance overhead #2757Issues Resolved
Testing
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