not having the tiered compilation would switch off c1, not c2. Tiered compilation is mostly an issue if the code generated remains c1 (the dumb compiler) and ne

not having the tiered compilation would switch off c1, not c2. Tiered compilation is mostly an issue if the code generated remains c1 (the dumb compiler) and never promotes to c2... or if there is an OSR (on stack replacement issue - bug) flip note: "java -XX:+PrintFlagsFinal -version", to see all available flags and their values, included the ones based on ergonomics.