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I think recent Christopher suggestions about tail call elimination is worth to consider, as it would allow to cut invocation cost of script functions quite nicely in many cases. Plus I am thinking of not creating Object[] array to pass arguments to callee if it is another interpreted function as it can directly access the caller stack. But first I decided to make some preparation work to simplify an implementation of these features later. The attached patch includes: 1. Moving all code to setup scope from InterpretedFunction.call/InterpretedFunction.call to Interpreter.interpret so the call method simply calls Interpreter.interpret. It would make tail call elimination code much simple. I also hope this simplifies changes Christopher needs for the continuations support (but I have strong reservation about possibility to implement it corectly). 2. Moving all declaration of temporary variables used only during processing of the single ICODE to the case blocks. 3. Interpreter loop termination only in RETURN icodes, not when pc exceeds icode size, so there is no need to check for this condition on each icode. (Scripts are handled via the special END_ICODE token). |
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<html> <!-- - The contents of this file are subject to the Netscape Public - License Version 1.1 (the "License"); you may not use this file - except in compliance with the License. You may obtain a copy of - the License at http://www.mozilla.org/NPL/ - - Software distributed under the License is distributed on an "AS - IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or - implied. See the License for the specific language governing - rights and limitations under the License. - - The Original Code is Rhino code, released - May 6, 1999. - - The Initial Developer of the Original Code is Netscape - Communications Corporation. Portions created by Netscape are - Copyright (C) 1998-1999 Netscape Communications Corporation. All - Rights Reserved. - - Contributor(s): - Norris Boyd - - Alternatively, the contents of this file may be used under the - terms of the GNU Public License (the "GPL"), in which case the - provisions of the GPL are applicable instead of those above. - If you wish to allow use of your version of this file only - under the terms of the GPL and not to allow others to use your - version of this file under the NPL, indicate your decision by - deleting the provisions above and replace them with the notice - and other provisions required by the GPL. If you do not delete - the provisions above, a recipient may use your version of this - file under either the NPL or the GPL. --> <body> <h1> <span CLASS=LXRSHORTDESC> Rhino: JavaScript in Java<p> </span> </h1> <span CLASS=LXRLONGDESC> Rhino is an implementation of JavaScript in Java. Documentation can be found <a href="http://www.mozilla.org/js/rhino/rhino.html">here</a>. </span> </body> </html>