x)- [x ] bug report -> please search issues before submitting
@angular/cli: 1.4.9
node: 6.11.0
os: win32 x64
@angular/*: 4.4.6
@angular/cli: 1.4.9
typescript: 2.3.4
udpate from 1.4.6 to 1.4.9 then run ng s --sm=false
blockin 71% sealing 1mn then go ahead
here's gif :

And how I hide all theses modules in console I juste want filename as before this polluate my console very ugly.

I'm experiencing the same issue, in my case it can be stuck on sealing for 5-10 min before it moves on.
Same problem...
I have the same problem.
I have same issue, could you check webpack version? The issue shows up starting from webpack@^3.7. For webpack 3.6, sealing takes only seconds.
@bingzheyuan I checked that.. @angular/[email protected] uses [email protected]
I also have the same issue and almost are very sure that the problem is with the Webpack. Downgrade to @angular/[email protected] helped.
This does sound like a problem in the new webpack versions. We updated to 3.7.1 in https://github.com/angular/angular-cli/pull/8014 and 3.8.1 in https://github.com/angular/angular-cli/pull/8132.
3.8.1 might fix this, but it wasn't released in 1.4.9. It should be in 1.5.0 final that is coming out very soon, and you can also try out 1.5.0-rc.3 meanwhile.
Thanks. It works on 1.5.0-rc.3 and node 6.11.0.
yes. it works a lot faster than the previous.
works faster only for this 71% step not faster globally , be clear
yes. lastly my build would take about 11.5 mins now it's taking 2.5 mins. lot improved on that perspective. but it's not fast like the earlier versions.
I confirm in v1.5.0-rc.3 it doesn't block a lot on 71%, now I have little blocking at step
76% basic chunk optimization donno whats done here...
here you are:

this is without aot of course
is this fixed in rc6 because there is not block at 71% but only at
0% compiling more than 30seconds
and semestimes on
10% building modules 0/1 modules 1 active ...s\i10\src\app\app.module.ngfactory.js more than 30seconds
it depend one or other
(in new project it's very fast)
@istiti facing this 10% building modules wait.. here too.
I think 1.5,0 final addressed the issue discussed here so I'm closing this issue.
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Most helpful comment
Thanks. It works on
1.5.0-rc.3and node6.11.0.