Php versions – Angular compilation slow

I have an API in Symfony-PHP, which I test it with postman and it works like a charm. But when I do ng serve --aot --optimization the application starts to build and the message of compiled successfully. takes more than a minute.
When I need to make a change to an html component such as a letter, it re-compiles the entire project and takes too long for such a small change.

The --watch parameter is set to true by default, which is ok. I don’t know if anyone knows why this compilation is so slow.

Versions:

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 10% building modules 7/8 modules 1 active ...sorquestados-front-usersrcstyles.cssBrowserslist: caniuse-lite is outdated.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.