Revise default optimization level (#1776)

BREAKING: Changes default optimization levels for `--optimize` respectively `-O` to `optimizeLevel=3` and `shrinkLevel=0`, which is more useful in practice.

Author: dcodeIO

cli/asc.js

@@ -171,7 +171,7 @@ exports.libraryPrefix = __getString(assemblyscript.LIBRARY_PREFIX.valueOf());
 exports.defaultOptimizeLevel = 3;
 
 /** Default Binaryen shrink level. */
-exports.defaultShrinkLevel = 1;
+exports.defaultShrinkLevel = 0;
 
 /** Bundled library files. */
 exports.libraryFiles = exports.isBundle ? BUNDLE_LIBRARY : (() => { // set up if not a bundle

cli/asc.json

@@ -35,7 +35,7 @@
     "description": [
       "Optimizes the module. Typical shorthands are:",
       "",
-      " Default optimizations   -O / -O3s",
+      " Default optimizations   -O",
       " Make a release build    -O --noAssert",
       " Make a debug build      --debug",
       " Optimize for speed      -Ospeed",
@@ -377,8 +377,8 @@
     "description": "Specifies node.js options (CLI only). See: node --help"
   },
 
-  "-Os": { "value": { "optimize": true, "shrinkLevel": 1 } },
-  "-Oz": { "value": { "optimize": true, "shrinkLevel": 2 } },
+  "-Os": { "value": { "optimizeLevel": 0, "shrinkLevel": 1 } },
+  "-Oz": { "value": { "optimizeLevel": 0, "shrinkLevel": 2 } },
   "-O0": { "value": { "optimizeLevel": 0, "shrinkLevel": 0 } },
   "-O1": { "value": { "optimizeLevel": 1, "shrinkLevel": 0 } },
   "-O2": { "value": { "optimizeLevel": 2, "shrinkLevel": 0 } },

tests/asconfig/complicated/assembly/index.ts

@@ -1,5 +1,5 @@
 assert(ASC_OPTIMIZE_LEVEL == 3, "expected optimize level == 3");
-assert(ASC_SHRINK_LEVEL == 1, "expected shrink level == 1");
+assert(ASC_SHRINK_LEVEL == 0, "expected shrink level == 0");
 assert(ASC_FEATURE_SIMD, "expected SIMD enabled");
 let size = memory.size();
 trace("size", 1, size);