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  19.    <H1>[whatwg] WebSocket bufferedAmount includes overhead or not</H1>
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  21.     <B>Boris Zbarsky</B> 
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  22.     <A HREF="mailto:whatwg%40lists.whatwg.org?Subject=Re%3A%20%5Bwhatwg%5D%20WebSocket%20bufferedAmount%20includes%20overhead%20or%20not&In-Reply-To=%3C4BB3C9D8.8010100%40mit.edu%3E"
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  23.        TITLE="[whatwg] WebSocket bufferedAmount includes overhead or not">bzbarsky at MIT.EDU
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  25.     <I>Wed Mar 31 15:16:56 PDT 2010</I>
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  41. <PRE>On 3/31/10 2:38 AM, Jonas Sicking wrote:
    42. 

  42. &gt;<i> I would have expected bufferedAmount to only change as a result of an
    43. 

  43. </I>&gt;<i> event being posted to the main event loop. We generally try to avoid
    44. 

  44. </I>&gt;<i> &quot;racy&quot; variables since people don't expect them. Consider for example
    45. 

  45. </I>&gt;<i>
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  46. </I>&gt;<i> if (ws.bufferedAmount&gt;  X) {
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  47. </I>&gt;<i>    setUpSomeState();
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  48. </I>&gt;<i> }
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  49. </I>&gt;<i>
    50. 

  50. </I>&gt;<i> try {
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  51. </I>&gt;<i>    doOtherThings();
    52. 

  52. </I>&gt;<i> }
    53. 

  53. </I>&gt;<i> finally {
    54. 

  54. </I>&gt;<i>    if (ws.bufferedAmount&gt;  X) {
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  55. </I>&gt;<i>      cleanUpState();
    56. 

  56. </I>&gt;<i>    }
    57. 

  57. </I>&gt;<i> }
    58. 

  58. </I>&gt;<i>
    59. 

  59. </I>&gt;<i> I'd imagine most JS developers to expect the cleanup to always happen
    60. 

  60. </I>&gt;<i> if the setup did.
    61. 

  61. </I>
    62. 

  62. Sure, but do they expect the cleanup to happen if the setup did not if 
    63. 

  63. doOtherThings tried to send() stuff?
    64. 

  64. 

  65. More to the point, is send() allowed to actually send anything when 
    66. 

  66. called, or does it have to buffer it all until the next time you get to 
    67. 

  67. the event loop?
    68. 

  68. 

  69. -Boris
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  70. 

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