diff options
Diffstat (limited to 'system')
| -rw-r--r-- | system/doc/efficiency_guide/commoncaveats.xmlsrc | 15 | ||||
| -rw-r--r-- | system/doc/tutorial/c_port.xmlsrc | 2 |
2 files changed, 11 insertions, 6 deletions
diff --git a/system/doc/efficiency_guide/commoncaveats.xmlsrc b/system/doc/efficiency_guide/commoncaveats.xmlsrc index fb004da203..6c5aa2b233 100644 --- a/system/doc/efficiency_guide/commoncaveats.xmlsrc +++ b/system/doc/efficiency_guide/commoncaveats.xmlsrc @@ -39,11 +39,16 @@ marker="erts:erlang#send_after/3">erlang:send_after/3</seemfa> and <seemfa marker="erts:erlang#start_timer/3">erlang:start_timer/3</seemfa>, - is much more efficient than using the timers provided by the - <seeerl marker="stdlib:timer">timer</seeerl> module in STDLIB. - The <c>timer</c> module uses a separate process to manage the timers. - That process can easily become overloaded if many processes - create and cancel timers frequently.</p> + is more efficient than using the timers provided by the + <seeerl marker="stdlib:timer">timer</seeerl> module in STDLIB.</p> + <p>The <c>timer</c> module uses a separate process to manage the timers. + Before OTP 25, this management overhead was substantial and increasing + with the number of timers, especially when they were short-lived, so the + timer server process could easily become overloaded and unresponsive. + In OTP 25, the timer module was improved by removing most of the management + overhead and the resulting performance penalty. Still, the timer server + remains a single process, and it may at some point become a bottleneck + of an application.</p> <p>The functions in the <c>timer</c> module that do not manage timers (such as <c>timer:tc/3</c> or <c>timer:sleep/1</c>), do not call the diff --git a/system/doc/tutorial/c_port.xmlsrc b/system/doc/tutorial/c_port.xmlsrc index e9a85b2f1d..5d24908fef 100644 --- a/system/doc/tutorial/c_port.xmlsrc +++ b/system/doc/tutorial/c_port.xmlsrc @@ -158,7 +158,7 @@ Eshell V4.9.1.2 (abort with ^G) {ok,complex1}</pre> <p><em>Step 3.</em> Run the example:</p> <pre> -2> <input>complex1:start("extprg").</input> +2> <input>complex1:start("./extprg").</input> <0.34.0> 3> <input>complex1:foo(3).</input> 4 |