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improve EOS VM OC cache lookup performance via hashed index #9740
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Change Description
The OC code cache was using an ordered index for the cache lookup. This results in surprisingly expensive lookups compared to a hashed index which suffices for this use case. Switch over to a hashed index.
Frees over 1% of main thread time on a busy chain in my tests. Actual results will vary depending on chain activity, hardware, etc
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Consensus Changes
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