Move incremental compilation section to the top

Author: fastred

README.md

@@ -8,11 +8,11 @@ Swift is constantly improving ❤️. For the time being, though, long compile t
 
 # Table of contents
 
+- [Incremental Compilation Mode with No Optimization](#incremental-compilation-mode-with-no-optimization)
 - [Type checking of functions and expressions](#type-checking-of-functions-and-expressions)
 - [Slowly compiling files](#slowly-compiling-files)
 - [Build active architecture only](#build-active-architecture-only)
 - [dSYM generation](#dsym-generation)
-- [Incremental Compilation Mode with No Optimization](#incremental-compilation-mode-with-no-optimization)
 - [Third-party dependencies](#third-party-dependencies)
 - [Modularization](#modularization)
 - [XIBs](#xibs)
@@ -21,6 +21,18 @@ Swift is constantly improving ❤️. For the time being, though, long compile t
 - [Enable concurrent Swift build tasks](#enable-concurrent-swift-build-tasks)
 - [Showing build times in Xcode](#showing-build-times-in-xcode)
 
+# Incremental Compilation Mode with No Optimization
+
+Until Xcode 10, it was common to enable [Whole Module Optimization](https://github.com/fastred/Optimizing-Swift-Build-Times/blob/ce6da1f3a47220259c3924df62f44f06bc45e222/README.md#whole-module-optimization) to speed up Debug builds. It was a workaround that's no longer needed in Xcode 10!
+
+Currently, the recommended setup is to have `Incremental` `Compilation Mode` set for Debug builds and `Whole Module` for Release builds. Also, `No Optimization` should be chosen for `Optimization Level` of Debug builds. 
+
+<img src="assets/compilation-and-optimization@2x.png" width="551">
+
+📖 Sources:
+
+- [What's New in Swift – WWDC 2018](https://developer.apple.com/videos/play/wwdc2018/401/?time=657)
+
 # Type checking of functions and expressions
 
 Swift build times are slow mostly because of expensive type checking. By default Xcode doesn't show code that's slow to compile. You can instruct it to show slowly compiling functions and expressions, though by adding:
@@ -110,18 +122,6 @@ Recommended setup:
 
 - [Speeding up Development Build Times With Conditional dSYM Generation](http://holko.pl/2016/10/18/dsym-debug/)
 
-# Incremental Compilation Mode with No Optimization
-
-Until Xcode 10, it was common to enable [Whole Module Optimization](https://github.com/fastred/Optimizing-Swift-Build-Times/blob/ce6da1f3a47220259c3924df62f44f06bc45e222/README.md#whole-module-optimization) to speed up Debug builds. It was a workaround that's no longer needed in Xcode 10!
-
-Currently, the recommended setup is to have `Incremental` `Compilation Mode` set for Debug builds and `Whole Module` for Release builds. Also, `No Optimization` should be chosen for `Optimization Level` of Debug builds. 
-
-<img src="assets/compilation-and-optimization@2x.png" width="551">
-
-📖 Sources:
-
-- [What's New in Swift – WWDC 2018](https://developer.apple.com/videos/play/wwdc2018/401/?time=657)
-
 # Third-party dependencies
 
 There are two ways you can embed third-party dependencies in your projects: