If you’re around Toa Payoh – Ang Mo Kio getting to Jurong East during peak hour.
You will find traveling to Bishan station and switching to Bishan Circle line to Buona Vista Circle Line then changing to Buona Vista to Jurong East is a time saver.
Do check your traveling route here – http://www.smrt.com.sg/Trains/NetworkMap.aspx
Walk from Buona Vista Circle Line to Buona Vista East West Line // 3minutes
Buona Vista East West to Jurong East // 20mins + 3minutes waiting time
No doubt, you have to walk twice at both Bishan station and Buona Vista station. This route is faster during peak hour.
My timing was 40mins from Toa Payoh Station to Jurong East Station.(Inclusive of normal walking speed to both lines)
The gauge is, if you’re at Yio Chu Kang or Yishun onwards. Do take the North South Line to Jurong East.