FFI: Simplify initializer rules. Clarify docs.

1 files changed, 7 insertions, 4 deletions

diff --git a/doc/ext_ffi.html b/doc/ext_ffi.html
index e8e2a62b..f496b51b 100644
--- a/doc/ext_ffi.html
+++ b/doc/ext_ffi.html
@@ -73,8 +73,8 @@ The FFI library is tightly integrated into LuaJIT (it's not available
 as a separate module). The code generated by the JIT-compiler for
 accesses to C data structures from Lua code is on par with the
 code a C compiler would generate. Calls to C functions can
-be inlined in the JIT-compiled code, unlike calls to functions bound
-via the classic Lua/C API.
+be inlined in JIT-compiled code, unlike calls to functions bound via
+the classic Lua/C API.
 </p>
 <p>
 This page gives a short introduction to the usage of the FFI library.
@@ -253,14 +253,17 @@ would consume 40&nbsp;Megabytes in plain Lua (on x64).
 Next, performance: the pure Lua version runs in 9.57 seconds (52.9
 seconds with the Lua interpreter) and the FFI version runs in 0.48
 seconds on my machine (YMMV). That's a factor of 20x faster (110x
-faster than with plain Lua).
+faster than the Lua interpreter).
 </p>
 <p style="font-size: 8pt;">
 The avid reader may notice that converting the pure Lua version over
 to use array indexes for the colors (<tt>[1]</tt> instead of
 <tt>.red</tt>, <tt>[2]</tt> instead of <tt>.green</tt> etc.) ought to
 be more compact and faster. This is certainly true (by a factor of
-~1.7x), but the resulting code would be less idiomatic and rather
+~1.7x). Switching to a struct-of-arrays would help, too.
+</p>
+<p style="font-size: 8pt;">
+However the resulting code would be less idiomatic and rather
 error-prone. And it still doesn't get even close to the performance of
 the FFI version of the code. Also, high-level data structures cannot
 be easily passed to other C&nbsp;functions, especially I/O functions,