Configuring LLVM

LLVM dynamic compilation can be used to generate customized machine code for each query to replace original common functions. The query performance is improved by reducing redundant judgment condition and virtual function invocation, and make local data more accurate during actual queries.

LLVM needs to consume extra time to pre-generate intermediate representation (IR) and compile it into codes. Therefore, if the data volume is small or if a query itself consumes less time, the performance deteriorates.

• LLVM Application Scenarios and Restrictions
  
• Other Factors Affecting LLVM Performance
  
• Recommended Suggestions for LLVM