467 lines
No EOL
9.5 KiB
HTML
467 lines
No EOL
9.5 KiB
HTML
<!DOCTYPE HTML>
|
|
<HTML LANG="en-us"
|
|
><HEAD
|
|
><TITLE
|
|
>optimize | Common Lisp Nova Spec</TITLE
|
|
><META CHARSET="US-ASCII"
|
|
><LINK REL="canonical" HREF="m_optimize.html"
|
|
><LINK REL="next" HREF="m_special.html" TYPE="text/html" TITLE="special"
|
|
><LINK REL="prev" HREF="m_declaration.html" TYPE="text/html" TITLE="declaration"
|
|
><LINK REL="up" HREF="3_8_Evaluation_and_Compilation_Dictionary.html" TYPE="text/html" TITLE="3.8 Evaluation and Compilation Dictionary"
|
|
><LINK REL="start" HREF="index.html" TYPE="text/html" TITLE="Common Lisp Nova Spec"
|
|
><META NAME="VIEWPORT" CONTENT="width=device-width, initial-scale=1.0"
|
|
><LINK REL="STYLESHEET" HREF="dpans.css%3F3909942064.css"
|
|
><SCRIPT SRC="dpans.js%3F3909942064"
|
|
></SCRIPT
|
|
><SCRIPT SRC="apropos.js%3F3909942064"
|
|
></SCRIPT
|
|
></HEAD
|
|
><BODY
|
|
><DIV
|
|
><DIV CLASS="topnav"
|
|
><DIV CLASS="breadcrumb"
|
|
><SPAN CLASS="breadcrumb-item"
|
|
><A HREF="index.html"
|
|
>Common Lisp Nova Spec</A
|
|
></SPAN
|
|
> <SPAN CLASS="breadcrumb-item"
|
|
>→ <A HREF="3_Evaluation_and_Compilation.html"
|
|
>3. Evaluation and Compilation</A
|
|
></SPAN
|
|
> <SPAN CLASS="breadcrumb-item"
|
|
>→ <A HREF="3_8_Evaluation_and_Compilation_Dictionary.html"
|
|
>3.8 Evaluation and Compilation Dictionary</A
|
|
></SPAN
|
|
> <SPAN CLASS="breadcrumb-item"
|
|
>→ <A HREF="m_optimize.html"
|
|
>optimize</A
|
|
></SPAN
|
|
></DIV
|
|
><DIV CLASS="apropos"
|
|
><DIV CLASS="apropos-io"
|
|
><A HREF="m_declaration.html" CLASS="prev"
|
|
>←</A
|
|
><SPAN ID="apropos-label"
|
|
>Apropos </SPAN
|
|
><INPUT ID="apropos" AUTOFOCUS="AUTOFOCUS" PLACEHOLDER="Type here to search" ONINPUT="aproposInput(this);" ONKEYUP="aproposKeyup(event);" ONCHANGE="aproposChange(this);" ONFOCUS="aproposFocus(this);" ONFOCUSOUT="aproposFocusout(this);"
|
|
><A HREF="m_special.html" CLASS="next"
|
|
>→</A
|
|
></DIV
|
|
><DIV ID="apropos-res"
|
|
></DIV
|
|
></DIV
|
|
></DIV
|
|
><DIV CLASS="matter"
|
|
><DIV CLASS="com"
|
|
><DIV CLASS="begincom"
|
|
><HR
|
|
><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
|
|
><TR
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
|
|
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="optimize"
|
|
></SPAN
|
|
><B
|
|
>optimize</B
|
|
></TD
|
|
><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
|
|
><I
|
|
>Declaration</I
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
><HR
|
|
></DIV
|
|
><UL CLASS="subtoc"
|
|
></UL
|
|
><DL
|
|
><DT
|
|
><B
|
|
>Syntax</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
><CODE CLASS="f"
|
|
>(optimize <SPAN CLASS="cmsy"
|
|
>{</SPAN
|
|
><VAR CLASS="param"
|
|
>quality</VAR
|
|
> | (<VAR CLASS="param"
|
|
>quality</VAR
|
|
> <VAR CLASS="param"
|
|
>value</VAR
|
|
>)<SPAN CLASS="cmsy"
|
|
>}</SPAN
|
|
><SPAN CLASS="cmr"
|
|
>*</SPAN
|
|
>)</CODE
|
|
></P
|
|
></DD
|
|
><DT
|
|
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="compilation-speed"
|
|
></SPAN
|
|
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="debug"
|
|
></SPAN
|
|
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="safety"
|
|
></SPAN
|
|
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="space"
|
|
></SPAN
|
|
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="speed"
|
|
></SPAN
|
|
><B
|
|
>Arguments</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
><VAR CLASS="param"
|
|
>quality</VAR
|
|
> — an <A HREF="26_1_Glossary.html#optimize_quality"
|
|
><EM CLASS="term"
|
|
>optimize quality</EM
|
|
></A
|
|
>. </P
|
|
><P CLASS="j"
|
|
><VAR CLASS="param"
|
|
>value</VAR
|
|
> — one of the <A HREF="26_1_Glossary.html#integer"
|
|
><EM CLASS="term"
|
|
>integers</EM
|
|
></A
|
|
> <CODE CLASS="f"
|
|
>0</CODE
|
|
>, <CODE CLASS="f"
|
|
>1</CODE
|
|
>, <CODE CLASS="f"
|
|
>2</CODE
|
|
>, or <CODE CLASS="f"
|
|
>3</CODE
|
|
>.</P
|
|
></DD
|
|
><DT
|
|
><B
|
|
>Valid Context</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
><A HREF="26_1_Glossary.html#declaration"
|
|
><EM CLASS="term"
|
|
>declaration</EM
|
|
></A
|
|
> or <A HREF="26_1_Glossary.html#proclamation"
|
|
><EM CLASS="term"
|
|
>proclamation</EM
|
|
></A
|
|
></P
|
|
></DD
|
|
><DT
|
|
><B
|
|
>Description</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
>Advises the compiler that each <VAR CLASS="param"
|
|
>quality</VAR
|
|
> should be given attention according to the specified corresponding <VAR CLASS="param"
|
|
>value</VAR
|
|
>. Each <VAR CLASS="param"
|
|
>quality</VAR
|
|
> must be a <A HREF="26_1_Glossary.html#symbol"
|
|
><EM CLASS="term"
|
|
>symbol</EM
|
|
></A
|
|
> naming an <A HREF="26_1_Glossary.html#optimize_quality"
|
|
><EM CLASS="term"
|
|
>optimize quality</EM
|
|
></A
|
|
>; the names and meanings of the standard <VAR CLASS="param"
|
|
>optimize qualities</VAR
|
|
> are shown in Figure 3–25.</P
|
|
><FIGURE CLASS="boxfig"
|
|
><DIV CLASS="figbody"
|
|
><TABLE CELLSPACING="0" CELLPADDING="0" RULES="GROUPS" STYLE="margin: 1ex 0" WIDTH="100%"
|
|
><THEAD
|
|
><TR
|
|
><TH ALIGN="LEFT" VALIGN="BASELINE" STYLE=";padding-right:3px"
|
|
><B
|
|
>Name</B
|
|
></TH
|
|
><TH ALIGN="LEFT" VALIGN="BASELINE" STYLE="padding-left:3px;"
|
|
> <B
|
|
>Meaning</B
|
|
></TH
|
|
></TR
|
|
></THEAD
|
|
><TBODY
|
|
><TR
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE=";padding-right:3px"
|
|
> <SPAN CLASS="declref"
|
|
><B
|
|
>compilation-speed</B
|
|
></SPAN
|
|
></TD
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE="padding-left:3px;"
|
|
> <SPAN CLASS="cmr"
|
|
>speed</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>of</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>the</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>compilation</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>process</SPAN
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE=";padding-right:3px"
|
|
> <SPAN CLASS="declref"
|
|
><B
|
|
>debug</B
|
|
></SPAN
|
|
></TD
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE="padding-left:3px;"
|
|
> <SPAN CLASS="cmr"
|
|
>ease</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>of</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>debugging</SPAN
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE=";padding-right:3px"
|
|
> <SPAN CLASS="declref"
|
|
><B
|
|
>safety</B
|
|
></SPAN
|
|
></TD
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE="padding-left:3px;"
|
|
> <SPAN CLASS="cmr"
|
|
>run-time</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>error</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>checking</SPAN
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE=";padding-right:3px"
|
|
> <SPAN CLASS="declref"
|
|
><B
|
|
>space</B
|
|
></SPAN
|
|
></TD
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE="padding-left:3px;"
|
|
> <SPAN CLASS="cmr"
|
|
>both</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>code</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>size</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>and</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>run-time</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>space</SPAN
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE=";padding-right:3px"
|
|
> <SPAN CLASS="declref"
|
|
><B
|
|
>speed</B
|
|
></SPAN
|
|
></TD
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" STYLE="padding-left:3px;"
|
|
> <SPAN CLASS="cmr"
|
|
>speed</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>of</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>the</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>object</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>code</SPAN
|
|
></TD
|
|
></TR
|
|
></TBODY
|
|
></TABLE
|
|
></DIV
|
|
><FIGCAPTION CLASS="caption"
|
|
><B
|
|
>Figure 3–25. Optimize qualities</B
|
|
></FIGCAPTION
|
|
></FIGURE
|
|
><P CLASS="j"
|
|
>There may be other, <A HREF="26_1_Glossary.html#implementation-defined"
|
|
><EM CLASS="term"
|
|
>implementation-defined</EM
|
|
></A
|
|
> <EM CLASS="term"
|
|
>optimize qualities</EM
|
|
>. </P
|
|
><P CLASS="j"
|
|
>A <VAR CLASS="param"
|
|
>value</VAR
|
|
> <CODE CLASS="f"
|
|
>0</CODE
|
|
> means that the corresponding <VAR CLASS="param"
|
|
>quality</VAR
|
|
> is totally unimportant, and <CODE CLASS="f"
|
|
>3</CODE
|
|
> that the <VAR CLASS="param"
|
|
>quality</VAR
|
|
> is extremely important; <CODE CLASS="f"
|
|
>1</CODE
|
|
> and <CODE CLASS="f"
|
|
>2</CODE
|
|
> are intermediate values, with <CODE CLASS="f"
|
|
>1</CODE
|
|
> the neutral value. <CODE CLASS="f"
|
|
>(<VAR CLASS="param"
|
|
>quality</VAR
|
|
> 3)</CODE
|
|
> can be abbreviated to <VAR CLASS="param"
|
|
>quality</VAR
|
|
>. </P
|
|
><P CLASS="j"
|
|
>Note that <A HREF="26_1_Glossary.html#code"
|
|
><EM CLASS="term"
|
|
>code</EM
|
|
></A
|
|
> which has the optimization <CODE CLASS="f"
|
|
>(safety 3)</CODE
|
|
>, or just <SPAN CLASS="typeref"
|
|
><B
|
|
>safety</B
|
|
></SPAN
|
|
>, is called <A HREF="26_1_Glossary.html#safe"
|
|
><EM CLASS="term"
|
|
>safe</EM
|
|
></A
|
|
> <A HREF="26_1_Glossary.html#code"
|
|
><EM CLASS="term"
|
|
>code</EM
|
|
></A
|
|
>. </P
|
|
><P CLASS="j"
|
|
>The consequences are unspecified if a <VAR CLASS="param"
|
|
>quality</VAR
|
|
> appears more than once with <A HREF="26_1_Glossary.html#different"
|
|
><EM CLASS="term"
|
|
>different</EM
|
|
></A
|
|
> <VAR CLASS="param"
|
|
>values</VAR
|
|
>.</P
|
|
></DD
|
|
><DT
|
|
><B
|
|
>Examples</B
|
|
></DT
|
|
><DD
|
|
><PRE CLASS="screen"
|
|
>(defun often-used-subroutine (x y)
|
|
(declare (optimize (safety 2)))
|
|
(error-check x y)
|
|
(hairy-setup x)
|
|
(do ((i 0 (+ i 1))
|
|
(z x (cdr z)))
|
|
((null z))
|
|
;; This inner loop really needs to burn.
|
|
(declare (optimize speed))
|
|
(declare (fixnum i))
|
|
))</PRE
|
|
></DD
|
|
><DT
|
|
><B
|
|
>See Also</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
><A HREF="m_declare.html" CLASS="misc"
|
|
><B
|
|
>declare</B
|
|
></A
|
|
>, <A HREF="f_declaim.html" CLASS="macref"
|
|
><B
|
|
>declaim</B
|
|
></A
|
|
>, <A HREF="f_proclaim.html" CLASS="funref"
|
|
><B
|
|
>proclaim</B
|
|
></A
|
|
>, <A HREF="3_3_Declarations.html#sec_3_3_4" CLASS="secref"
|
|
><SPAN CLASS="cmr"
|
|
>Section</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>3.3.4</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>(Declaration</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>Scope)</SPAN
|
|
></A
|
|
></P
|
|
></DD
|
|
><DT
|
|
><B
|
|
>Notes</B
|
|
></DT
|
|
><DD
|
|
><P CLASS="j"
|
|
>An <A HREF="m_optimize.html" CLASS="declref"
|
|
><B
|
|
>optimize</B
|
|
></A
|
|
> declaration never applies to either a <A HREF="26_1_Glossary.html#variable"
|
|
><EM CLASS="term"
|
|
>variable</EM
|
|
></A
|
|
> or a <A HREF="26_1_Glossary.html#function"
|
|
><EM CLASS="term"
|
|
>function</EM
|
|
></A
|
|
> <A HREF="26_1_Glossary.html#binding"
|
|
><EM CLASS="term"
|
|
>binding</EM
|
|
></A
|
|
>. An <A HREF="m_optimize.html" CLASS="declref"
|
|
><B
|
|
>optimize</B
|
|
></A
|
|
> declaration can only be a <A HREF="26_1_Glossary.html#free_declaration"
|
|
><EM CLASS="term"
|
|
>free declaration</EM
|
|
></A
|
|
>. For more information, see <A HREF="3_3_Declarations.html#sec_3_3_4" CLASS="secref"
|
|
><SPAN CLASS="cmr"
|
|
>Section</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>3.3.4</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>(Declaration</SPAN
|
|
> <SPAN CLASS="cmr"
|
|
>Scope)</SPAN
|
|
></A
|
|
>.</P
|
|
></DD
|
|
></DL
|
|
></DIV
|
|
></DIV
|
|
><DIV CLASS="footer"
|
|
><DIV CLASS="btmnav"
|
|
><A HREF="m_declaration.html" CLASS="prev"
|
|
>←</A
|
|
><A HREF="m_special.html" CLASS="next"
|
|
>→</A
|
|
></DIV
|
|
><DIV CLASS="trail"
|
|
>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
|
|
></DIV
|
|
></DIV
|
|
><SCRIPT
|
|
>domReady();</SCRIPT
|
|
></BODY
|
|
></HTML
|
|
> |