lyang24 opened a new pull request, #9319:
URL: https://github.com/apache/arrow-rs/pull/9319
# Which issue does this PR close?
minor issue
# Rationale for this change
for predicate cache the mutex blocks read/ read thread while rwlock give
better parallelism in this situation.
# What changes are included in this PR?
replace mutex with rwlock
# Are these changes tested?
all tests should pass
# Are there any user-facing changes?
no
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