High CPU usage when import uglified js file

[xbol0]

• VSCode Version:1.35.1
• OS Version:OSX 10.14.5

Steps to Reproduce:

1.import a big uglified js file
2.start tsserver then cause high cpu usage

try this file
p.zip

Does this issue occur when all extensions are disabled?: Yes/No
When I disabled TypeScript and JavaScript Language Features its ok.

[mjbvz]

I confirmed this with typescript@3.6.0-dev.20190619. Having the linked file in the project seems to cause the server to stall on:

Info 30   [15:14:50.830] Starting updateGraphWorker: Project: /Users/matb/projects/san/jsconfig.json

if you have a jsconfig, or if there is no config:

Info 111  [15:16:48.865] Starting updateGraphWorker: Project: /dev/null/inferredProject1*

[sheetalkamat]

Seems to be stuck in parsing polyv.js. Looking deeper to see whats going on

[sheetalkamat]

Seems like it trips trying to determine if its experssion or arrow (trying to see if they are arrow parameters or just parenthesixed expression)

(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=(E=E+((((w=(w=(w=w+(606105819+(((S=(S=(S=S+((((M=(M=(M=M+(((E&w|(-1^E)&S)+(0|o[T>>2])|0)-680876936|0)|0)<<7|M>>>25)+E|0)&E|(-1^M)&w)+(0|o[(T+4|0)>>2])|0)-389564586|0)|0)<<12|S>>>20)+M|0)&M|(-1^S)&E)+(0|o[(T+8|0)>>2])|0)|0)|0)<<17|w>>>15)+S|0)&S|(-1^w)&M)+(0|o[(T+12|0)>>2])|0)-1044525330|0)|0)<<22|E>>>10)+w|0)+((((w=(w=(w=w+((((S=(S=(S=S+(1200080426+(((M=(M=(M=M+(((E&w|(-1^E)&S)+(0|o[(T+16|0)>>2])|0)-176418897|0)|0)<<7|M>>>25)+E|0)&E|(-1^M)&w)+(0|o[(T+20|0)>>2])|0)|0)|0)<<12|S>>>20)+M|0)&M|(-1^S)&E)+(0|o[(T+24|0)>>2])|0)-1473231341|0)|0)<<17|w>>>15)+S|0)&S|(-1^w)&M)+(0|o[(T+28|0)>>2])|0)-45705983|0)|0)<<22|E>>>10)+w|0)+((((w=(w=(w=w+((((S=(S=(S=S+((((M=(M=(M=M+(1770035416+((E&w|(-1^E)&S)+(0|o[(T+32|0)>>2])|0)|0)|0)<<7|M>>>25)+E|0)&E|(-1^M)&w)+(0|o[(T+36|0)>>2])|0)-1958414417|0)|0)<<12|S>>>20)+M|0)&M|(-1^S)&E)+(0|o[(T+40|0)>>2])|0)-42063|0)|0)<<17|w>>>15)+S|0)&S|(-1^w)&M)+(0|o[(T+44|0)>>2])|0)-1990404162|0)|0)<<22|E>>>10)+w|0)+(1236535329+(((w=(w=(w=w+((((S=(S=(S=S+((((M=(M=(M=M+(1804603682+((E&w|(-1^E)&S)+(0|o[(T+48|0)>>2])|0)|0)|0)<<7|M>>>25)+E|0)&E|(-1^M)&w)+(0|o[(T+52|0)>>2])|0)-40341101|0)|0)<<12|S>>>20)+M|0)&M|(-1^S)&E)+(0|o[(T+56|0)>>2])|0)-1502002290|0)|0)<<17|w>>>15)+S|0)&S|(-1^w)&M)+(0|o[(T+60|0)>>2])|0)|0)|0)<<22|E>>>10)+w|0)+((((w=(w=(w=w+(643717713+(((S=(S=(S=S+((((M=(M=(M=M+(((E&S|w&(-1^S))+(0|o[(T+4|0)>>2])|0)-165796510|0)|0)<<5|M>>>27)+E|0)&w|E&(-1^w))+(0|o[(T+24|0)>>2])|0)-1069501632|0)|0)<<9|S>>>23)+M|0)&E|M&(-1^E))+(0|o[(T+44|0)>>2])|0)|0)|0)<<14|w>>>18)+S|0)&M|S&(-1^M))+(0|o[T>>2])|0)-373897302|0)|0)<<20|E>>>12)+w|0)+((((w=(w=(w=w+((((S=(S=(S=S+(38016083+(((M=(M=(M=M+(((E&S|w&(-1^S))+(0|o[(T+20|0)>>2])|0)-701558691|0)|0)<<5|M>>>27)+E|0)&w|E&(-1^w))+(0|o[(T+40|0)>>2])|0)|0)|0)<<9|S>>>23)+M|0)&E|M&(-1^E))+(0|o[(T+60|0)>>2])|0)-660478335|0)|0)<<14|w>>>18)+S|0)&M|S&(-1^M))+(0|o[(T+16|0)>>2])|0)-405537848|0)|0)<<20|E>>>12)+w|0)+(1163531501+(((w=(w=(w=w+((((S=(S=(S=S+((((M=(M=(M=M+(568446438+((E&S|w&(-1^S))+(0|o[(T+36|0)>>2])|0)|0)|0)<<5|M>>>27)+E|0)&w|E&(-1^w))+(0|o[(T+56|0)>>2])|0)-1019803690|0)|0)<<9|S>>>23)+M|0)&E|M&(-1^E))+(0|o[(T+12|0)>>2])|0)-187363961|0)|0)<<14|w>>>18)+S|0)&M|S&(-1^M))+(0|o[(T+32|0)>>2])|0)|0)|0)<<20|E>>>12)+w|0)+((((w=(w=(w=w+(1735328473+(((S=(S=(S=S+((((M=(M=(M=M+(((E&S|w&(-1^S))+(0|o[(T+52|0)>>2])|0)-1444681467|0)|0)<<5|M>>>27)+E|0)&w|E&(-1^w))+(0|o[(T+8|0)>>2])|0)-51403784|0)|0)<<9|S>>>23)+M|0)&E|M&(-1^E))+(0|o[(T+28|0)>>2])|0)|0)|0)<<14|w>>>18)+S|0)&M|S&(-1^M))+(0|o[(T+48|0)>>2])|0)-1926607734|0)|0)<<20|E>>>12)+w|0)+((((w=(w=(w=w+(1839030562+(((S=(S=(S=S+((((M=(M=(M=M+(((E^w^S)+(0|o[(T+20|0)>>2])|0)-378558|0)|0)<<4|M>>>28)+E|0)^E^w)+(0|o[(T+32|0)>>2])|0)-2022574463|0)|0)<<11|S>>>21)+M|0)^M^E)+(0|o[(T+44|0)>>2])|0)|0)|0)<<16|w>>>16)+S|0)^S^M)+(0|o[(T+56|0)>>2])|0)-35309556|0)|0)<<23|E>>>9)+w|0)+((((w=(w=(w=w+((((S=(S=(S=S+(1272893353+(((M=(M=(M=M+(((E^w^S)+(0|o[(T+4|0)>>2])|0)-1530992060|0)|0)<<4|M>>>28)+E|0)^E^w)+(0|o[(T+16|0)>>2])|0)|0)|0)<<11|S>>>21)+M|0)^M^E)+(0|o[(T+28|0)>>2])|0)-155497632|0)|0)<<16|w>>>16)+S|0)^S^M)+(0|o[(T+40|0)>>2])|0)-1094730640|0)|0)<<23|E>>>9)+w|0)+(76029189+(((w=(w=(w=w+((((S=(S=(S=S+((((M=(M=(M=M+(681279174+((E^w^S)+(0|o[(T+52|0)>>2])|0)|0)|0)<<4|M>>>28)+E|0)^E^w)+(0|o[T>>2])|0)-358537222|0)|0)<<11|S>>>21)+M|0)^M^E)+(0|o[(T+12|0)>>2])|0)-722521979|0)|0)<<16|w>>>16)+S|0)^S^M)+(0|o[(T+24|0)>>2])|0)|0)|0)<<23|E>>>9)+w|0)+((((w=(w=(w=w+(530742520+(((S=(S=(S=S+((((M=(M=(M=M+(((E^w^S)+(0|o[(T+36|0)>>2])|0)-640364487|0)|0)<<4|M>>>28)+E|0)^E^w)+(0|o[(T+48|0)>>2])|0)-421815835|0)|0)<<11|S>>>21)+M|0)^M^E)+(0|o[(T+60|0)>>2])|0)|0)|0)<<16|w>>>16)+S|0)^S^M)+(0|o[(T+8|0)>>2])|0)-995338651|0)|0)<<23|E>>>9)+w|0)+((((S=(S=(S=S+(1126891415+((E^((M=(M=(M=M+(((w^(E|-1^S))+(0|o[T>>2])|0)-198630844|0)|0)<<6|M>>>26)+E|0)|-1^w))+(0|o[(T+28|0)>>2])|0)|0)|0)<<10|S>>>22)+M|0)^((w=(w=(w=w+(((M^(S|-1^E))+(0|o[(T+56|0)>>2])|0)-1416354905|0)|0)<<15|w>>>17)+S|0)|-1^M))+(0|o[(T+20|0)>>2])|0)-57434055|0)|0)<<21|E>>>11)+w|0)+((((S=(S=(S=S+(((E^((M=(M=(M=M+(1700485571+((w^(E|-1^S))+(0|o[(T+48|0)>>2])|0)|0)|0)<<6|M>>>26)+E|0)|-1^w))+(0|o[(T+12|0)>>2])|0)-1894986606|0)|0)<<10|S>>>22)+M|0)^((w=(w=(w=w+(((M^(S|-1^E))+(0|o[(T+40|0)>>2])|0)-1051523|0)|0)<<15|w>>>17)+S|0)|-1^M))+(0|o[(T+4|0)>>2])|0)-2054922799|0)|0)<<21|E>>>11)+w|0)+(1309151649+(((S=(S=(S=S+(((E^((M=(M=(M=M+(1873313359+((w^(E|-1^S))+(0|o[(T+32|0)>>2])|0)|0)|0)<<6|M>>>26)+E|0)|-1^w))+(0|o[(T+60|0)>>2])|0)-30611744|0)|0)<<10|S>>>22)+M|0)^((w=(w=(w=w+(((M^(S|-1^E))+(0|o[(T+24|0)>>2])|0)-1560198380|0)|0)<<15|w>>>17)+S|0)|-1^M))+(0|o[(T+52|0)>>2])|0)|0)|0)<<21|E>>>11)+w|0)+((((S=(S=(S=S+(((E^((M=(M=(M=M+(((w^(E|-1^S))+(0|o[(T+16|0)>>2])|0)-145523070|0)|0)<<6|M>>>26)+E|0)|-1^w))+(0|o[(T+44|0)>>2])|0)-1120210379|0)|0)<<10|S>>>22)+M|0)^((w=(w=(w=w+(718787259+((M^(S|-1^E))+(0|o[(T+8|0)>>2])|0)|0)|0)<<15|w>>>17)+S|0)|-1^M))+(0|o[(T+36|0)>>2])|0)-343485551|0)|0)<<21|E>>>11)+w|0,r=M,a=(0|o[(i=y)>>2])+r|0,o[i>>2]=a,u=E,c=(0|o[(s=y+4|0)>>2])+u|0,o[s>>2]=c,d=w,p=(0|o[(h=y+8|0)>>2])+d|0,o[h>>2]=p,_=S,g=(0|o[(m=y+12|0)>>2])+_|0,o[m>>2]=g,f=v}function z(e,t,r){e|=0,t|=0,r|=0;var