What is the test for showing prejudice against a defendant in a criminal case?

^7. Appellant asserts that under United States v. Cronic (1984) 466 U.S. 648, 659 [104 S.Ct. 2039, 80 L.Ed.2d 657], he is not required to show prejudice because defense counsel entirely failed to subject the prosecutor's case to meaningful adversarial testing. The case is inapposite because here, the record shows that defense counsel competently represented appellant by, among other things, arguing motions in limine, giving an opening statement and closing argument, thoroughly cross-examining the prosecution's witnesses, objecting to testimony, and attempting to present a witness on appellant's behalf.