Doc: Clarify that QV4_FORCE_INTERPRETER will also not use the compiler

Change-Id: I987b739ff30a92b06bcd5f4c4b57604a930263b9
Reviewed-by: Semih Yavuz <semih.yavuz@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Olivier De Cannière <olivier.decanniere@qt.io>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/qml/doc/src/javascript/finetuning.qdoc b/src/qml/doc/src/javascript/finetuning.qdoc
index fb13c0bab8..0e8a913a2a 100644
--- a/src/qml/doc/src/javascript/finetuning.qdoc
+++ b/src/qml/doc/src/javascript/finetuning.qdoc
@@ -20,8 +20,11 @@ Running JavaScript code can be influenced by a few environment variables, partic
             considered for JIT compilation. The default value is 3 times.
     \row
         \li \c{QV4_FORCE_INTERPRETER}
-        \li Setting this environment variable disables the JIT and runs all
-            functions through the interpreter, no matter how often they are called.
+        \li Setting this environment variable runs all functions and expressions through the
+            interpreter. The JIT is never used, no matter how often a function or expression is
+            called. Functions and expressions may still be compiled ahead of time using
+            \l{qmlcachegen} or \l{qmlsc}, but only the generated byte code is used at run time. Any
+            generated C++ code and the machine code resulting from it is ignored.
     \row
         \li \c{QV4_JS_MAX_STACK_SIZE}
         \li The JavaScript engine reserves a special memory area as a stack to run JavaScript.