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| module.exports = options => ({
| terserOptions: {
| compress: {
| // turn off flags with small gains to speed up minification
| arrows: false,
| collapse_vars: false, // 0.3kb
| comparisons: false,
| computed_props: false,
| hoist_funs: false,
| hoist_props: false,
| hoist_vars: false,
| inline: false,
| loops: false,
| negate_iife: false,
| properties: false,
| reduce_funcs: false,
| reduce_vars: false,
| switches: false,
| toplevel: false,
| typeofs: false,
|
| // a few flags with noticable gains/speed ratio
| // numbers based on out of the box vendor bundle
| booleans: true, // 0.7kb
| if_return: true, // 0.4kb
| sequences: true, // 0.7kb
| unused: true, // 2.3kb
|
| // required features to drop conditional branches
| conditionals: true,
| dead_code: true,
| evaluate: true
| },
| mangle: {
| safari10: true
| }
| },
| sourceMap: options.productionSourceMap,
| cache: true,
| parallel: options.parallel,
| extractComments: false
| })
|
|
