test/nashorn/examples/getter-setter-micro.js
author rwestberg
Mon, 04 Jun 2018 16:21:08 +0200
changeset 50391 2bea53d7a27b
parent 47216 71c04702a3d5
permissions -rw-r--r--
8202095: JFR TestBiasedLockRevocationEvents should cope with multiple events during a single safepoint Reviewed-by: mgronlun, egahlin
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/*
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 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 *   - Redistributions of source code must retain the above copyright
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 *     notice, this list of conditions and the following disclaimer.
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 *
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 *   - Redistributions in binary form must reproduce the above copyright
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 *     notice, this list of conditions and the following disclaimer in the
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 *     documentation and/or other materials provided with the distribution.
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 *
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 *   - Neither the name of Oracle nor the names of its
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 *     contributors may be used to endorse or promote products derived
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 *     from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/*
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 * A micro-benchmark for getters and setters with primitive values,
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 * alternating between ints and doubles. Introduction of primitive
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 * and optimistic user accessors in JDK-8062401 make this faster by
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 * 10x or more by allowing inlining and other optimizations to take place.
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 */
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var x = {
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    get m() {
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        return this._m;
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    },
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    set m(v) {
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        this._m = v;
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    },
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    get n() {
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        return this._n;
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    },
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    set n(v) {
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        this._n = v;
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    }
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};
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function bench(v1, v2, result) {
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    var start = Date.now();
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    x.n = v1;
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    for (var i = 0; i < 1e8; i++) {
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        x.m = v2;
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        if (x.m + x.n !== result) {
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            throw "wrong result";
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        }
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    }
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    print("done in", Date.now() - start, "millis");
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}
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for (var i = 0; i < 10; i++) {
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    bench(i, 4, 4 + i);
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}
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for (var i = 0; i < 10; i++) {
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    bench(i, 4.5, 4.5 + i);
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}
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for (var i = 0; i < 10; i++) {
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    bench(i, 5, 5 + i);
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}
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for (var i = 0; i < 10; i++) {
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    bench(i, 5.5, 5.5 + i);
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}