临时解决方案，在项目根目录添加 vue.config.js 文件，内容如下
```js
module.exports = {
chainWebpack: (config) => {
config.optimization.minimizer('terser').tap((args) => {
const compress = args[0].terserOptions.compress
compress.passes = 2
compress.reduce_funcs = true
compress.reduce_vars = true
return args
})
}
}
```

再修改一下HBuilderX内置的uni-app编译插件的babel配置`HBuilderX/plugins/uniapp-cli/babel.config.js`
注释掉55行的if块
```js
// if (process.env.UNI_PLATFORM !== 'h5') {
// plugins.push('@babel/plugin-transform-runtime')
// }
```
将58行的config对象修改为
```js
const config = {
presets: [
[
'@vue/app',
{
modules: webpack.version[0] > 4 ? 'auto' : 'commonjs',
useBuiltIns: process.env.UNI_PLATFORM === 'h5' ? 'usage' : 'entry',
exclude: ['h5', 'app-plus'].includes(process.env.UNI_PLATFORM) ? undefined : ['@babel/plugin-transform-async-to-generator', '@babel/plugin-transform-regenerator']
}
]
],
plugins
}
```
注意此修改关闭了uni-app对部分es6语法的转化，如有需要请在小程序开发工具内开启es6到es5的转化