R Under development (unstable) (2024-03-19 r86153 ucrt) -- "Unsuffered Consequences"
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> 
> library(survey)
Loading required package: grid
Loading required package: Matrix
Loading required package: survival

Attaching package: 'survey'

The following object is masked from 'package:graphics':

    dotchart

> data(api)
> dstrat<-svydesign(id=~1,strata=~stype, weights=~pw, data=apistrat, fpc=~fpc)
> a<-summary(svyglm(api00~ell+meals+mobility, design=dstrat))
> b<- summary(svyivreg(api00~ell+meals+mobility, design=dstrat))
> stopifnot(isTRUE(all.equal(a$cov.scaled, b$vcov)))
> 
> proc.time()
   user  system elapsed 
   1.71    0.32    2.03