<style>
/* Changing the layout to use less space for mobiles */
@media screen and (max-device-width: 480px), screen and (-webkit-min-device-pixel-ratio: 2) {
    #email-body { min-width: 30em !important; }
    #email-page { padding: 8px !important; }
    #email-banner { padding: 8px 8px 0 8px !important; }
    #email-avatar { margin: 1px 8px 8px 0 !important; padding: 0 !important; }
    #email-fields { padding: 0 8px 8px 8px !important; }
    #email-gutter { width: 0 !important; }
}
</style>
<div id="email-body">
<table id="email-wrap" align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#f0f0f0;color:#000000;width:100%;">
    <tr valign="top">
        <td id="email-page" style="padding:16px !important;">
            <table align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#ffffff;border:1px solid #bbbbbb;color:#000000;width:100%;">
                <tr valign="top">
                    <td bgcolor="#4d5c47" style="background-color:#4d5c47;color:#ffffcc;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;line-height:1;"><img src="http://www.crosswire.org/bugs/s/en_US-l73y3/783/14/_/jira-logo-scaled.png" alt="" style="vertical-align:top;" /></td>
                </tr><tr valign="top">
    <td id="email-banner" style="padding:32px 32px 0 32px;">

                
        
        
            <table align="left" border="0" cellpadding="0" cellspacing="0" width="100%" style="width:100%;">
    <tr valign="top">
        <td style="color:#505050;font-family:Arial,FreeSans,Helvetica,sans-serif;padding:0;">
                                        <img id="email-avatar" src="http://www.crosswire.org/bugs/secure/useravatar?avatarId=10062" alt="" height="48" width="48" border="0" align="left" style="padding:0;margin: 0 16px 16px 0;" />
                        <div id="email-action" style="padding: 0 0 8px 0;font-size:12px;line-height:18px;">
                                    <a class="user-hover" rel="chrisburrell" id="email_chrisburrell" href="http://www.crosswire.org/bugs/secure/ViewProfile.jspa?name=chrisburrell" style="color:#000000;">Chris Burrell</a>
     commented on <img src="http://www.crosswire.org/bugs/images/icons/improvement.gif" height="16" width="16" border="0" align="absmiddle" alt="Improvement"> <a style='color:#000000;text-decoration:none;' href='http://www.crosswire.org/bugs/browse/JS-153'>JS-153</a>
            </div>
                        <div id="email-summary" style="font-size:16px;line-height:20px;padding:2px 0 16px 0;">
                <a style='color:#000000;text-decoration:none;' href='http://www.crosswire.org/bugs/browse/JS-153'><strong>Improve startup</strong></a>
            </div>
                    </td>
    </tr>
</table>
    </td>
</tr>
<tr valign="top">
    <td id="email-fields" style="padding:0 32px 32px 32px;">
        <table border="0" cellpadding="0" cellspacing="0" style="padding:0;text-align:left;width:100%;" width="100%">
            <tr valign="top">
                <td id="email-gutter" style="width:64px;white-space:nowrap;"></td>
                <td>
                    <table border="0" cellpadding="0" cellspacing="0" width="100%">
                        <tr valign="top">
    <td colspan="2" style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 16px 0;width:100%;">
        <div class="comment-block" style="background-color:#edf5ff;border:1px solid #dddddd;color:#000000;padding:12px;"><p>Hi DM,</p>

<p>In Java 5, double checked locking is safe if done correctly. We should remove this as a warning from Checkstyle, and add the findbugs rule (if we really want something) to ensure that when it is present, it is implemented correctly.</p>

<p>HOWEVER, I would rather doubly initialise than introduce synchronization. Synchronization is relatively slow and can prevent multi-threaded environment. At the moment, I believe I am the only one to be building a concurrent system, and so my preference would be to go for the naive approach of checking whether a variable is instantiated and if not, to instantiate it.</p>

<p>public void init() {<br/>
Var var = getMyVar();<br/>
if(var == null) {<br/>
 var = new Var();<br/>
}<br/>
return var;<br/>
}</p>

<p>In a single threaded environment (like most start-up phases) this is never going to be an issue. The times where we doubly initialise will only happen to me and I'd prefer that to synchronization.</p>

</div>
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        </td>
    </tr>
</table><!-- End #email-wrap -->
</div><!-- End #email-body -->