guillon commented on issue #17072:
URL: https://github.com/apache/tvm/issues/17072#issuecomment-2252513226

   Using synchronization may be more costly and error prone than a simple 
thread local cache as proposed above, you may experiment with both.
   
   Though, actually I didn't understand the rationale for making à global 
expression cache. Shouldn't the cache be local to some function scope, hence a 
bare member of some parent object  instead of a global state?
   Perhaps were there some experiments conducted at the time of this addition?
   
   


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