[Freeswitch-users] How many calls can FreeSwitch bridge simultaeously

My FreeSwitch app needs to bridge a lot of calls, and process all the media. I'm using PCMU, and every inbound call gets bridged to another outbound call. There shouldn't be any transcoding. How many concurrent calls can FreeSwitch support under this scenario? Can someone point me to any performance measurements for FreeSwitch? Thanks.