Overview Matthias Boehm, Graz University of Technology, WS 2020/21 Paper Projects, cont.  Query Compilation  #15.1 Timo Kersten, Viktor Leis, Alfons Kemper, Thomas Neumann, Andrew Pavlo, Peter A. Boncz: Prashanth Menon, Andrew Pavlo, Todd C. Mowry: Relaxed Operator Fusion for In- Memory Databases: Making Compilation, Vectorization, and Prefetching Work Together At Last. PVLDB 11(1) 2017  #15.3 Andrew Crotty

Result Interpretation, cont.  Use the Right PL Tools / Flags  E.g., Understanding Java JIT compilation -XX:+PrintCompilation  E.g., Understanding HW Cache Hierarchy (L1i 32KB) -XX:-DontCompileHugeMethods

language and gives you many fancy features such as metaclasses, access to bytecode, on-the-fly compilation, dy- namic inheritance, object reparenting, import hacks, reflection, modification of system internals

variables can be declared constexpr to indicate the variables are true con- stants, i.e. fixed at compilation/link time. Some functions and constructors can be declared constexpr which enables them to be used