Angular 编译慢

Question

我在 Symfony-PHP 中有一个 API，我用 [=23] 测试了它=]postman，它就像一个魅力。但是当我执行 ng serve --aot --optimization 时，应用程序开始构建并且 compiled successfully. 的消息需要一分多钟。当我需要对 html 组件（例如字母）进行更改时，它会重新编译整个项目并且对于这么小的更改需要很长时间。

--watch参数默认设置为true，就可以了。不知道有没有人知道为什么这个编译这么慢

版本：

Angular CLI: 6.2.2
Node: 8.12.0
OS: win32 x64
Angular:
...

Package                      Version
------------------------------------------------------
@angular-devkit/architect    0.8.2
@angular-devkit/core         0.8.2
@angular-devkit/schematics   0.8.2
@schematics/angular          0.8.2
@schematics/update           0.8.2
rxjs                         6.2.2
typescript                   2.9.2


oscar@ubuntu:~$: ng s --aot --optimization


****************************************************************************************
This is a simple server for use in testing or debugging Angular applications locally.
It hasn't been reviewed for security issues.

DON'T USE IT FOR PRODUCTION!
****************************************************************************************
** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **
 10% building modules 7/8 modules 1 active ...s\orquestados-front-user\src\styles.cssBrowserslist: caniuse-lite is outdated. Please run next command `n 70% building modules 646/646 modules 0 activei ｢wdm｣: wait until bundle finished: /pages/offer/management/219702                                             92% chunk asset optimization TerserPlugini ｢wdm｣: wait until bundle finished: /pages/offer/management/219702
i ｢wdm｣: wait until bundle finished: /pages/offer/management/219702
Date: 2019-09-30T08:30:18.736Z
Hash: 9afdb6037df5643d0cb2
Time: 512136ms
chunk {0} runtime.js, runtime.js.map (runtime) 1.45 kB [entry] [rendered]
chunk {1} main.js, main.js.map (main) 2.3 MB [initial] [rendered]
chunk {2} polyfills.js, polyfills.js.map (polyfills) 62 kB [initial] [rendered]
chunk {3} styles.js, styles.js.map (styles) 45.6 kB [initial] [rendered]
chunk {4} vendor.js, vendor.js.map (vendor) 1020 kB [initial] [rendered]
i ｢wdm｣: Compiled successfully.

Answer 1

省略 --optimization。那么基于变化的构建将花费更少的时间。也可以尝试不使用 --aot。第一次构建总是需要一些时间。但是增量构建只需要几秒钟。

Answer 2

您可以简单地使用 ng s。仅生产构建需要 AOT 和优化。

ng s

Angular 编译慢

Angular compilation slow

node.js

angular-cli

angular