src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/annotations/SpecializedFunction.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package jdk.nashorn.internal.objects.annotations;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * The SpecializedFunction annotation is used to flag more type specific functions than the standard one in
 * Native objects. For example {@link jdk.nashorn.internal.objects.NativeMath#max} takes an arbitrary number of
 * Object elements as an array. Call this function, including the varargs collector that allocates the array
 * upon each invocation, is much more expensive than calling a specialized function that takes two arguments
 * of, e.g. int type from the call site, such as {@link jdk.nashorn.internal.objects.NativeMath#max(Object, int, int)}.
 * {@link jdk.nashorn.internal.runtime.ScriptFunction} will try to look up the most specific function when
 * linking the callsite.
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface SpecializedFunction {
    //empty
}