Is inserting multiple queries takes same time as that of single query?

I have a requirement where I have to insert a lots of rows.For inserting we use like this

insert into emp(name,age) values('abc',12);

This will insert only one row.For inserting multiple rows we can either write insert query multiple times or write a single query with multiple values.For example

condtion1

insert into emp(name,age) values('abc1',121);
insert into emp(name,age) values('abc2',122);
insert into emp(name,age) values('abc3',12);

condition2

insert into emp(name,age) values('abc',12),('abc2',122),('abc3',12);

My question is are both (condition1 and condition2) above takes time?I guess condtion2 takes less time than condition2. If my guess is true then what is the reason for it?