Among others, from the linked article: About 5-10% performance improvement by removing all trace instructions from overall bytecode (instruction

Among others, from the linked article: About 5-10% performance improvement by removing all trace instructions from overall bytecode (instruction sequences). The trace instruction was added to support the TracePoint. However, in most cases, TracePoint is not used and trace instructions are pure overhead. Instead, now we use a dynamic instrumentation technique. See [Feature #14104] for more details.