Force the TZ environment variable to be set during initdb.  This is to short-circuit the rather expensive identify_system_timezone() procedure, which we have no real need for during initdb since nothing done here depends on the timezone setting.  Since we launch quite a few standalone backends during the initdb sequence, this adds up to a significant savings, and seems worth doing to save developer time even though it will hardly matter to end users.  Per my report today on pgsql-hackers.
Force the TZ environment variable to be set during initdb.  This is to
short-circuit the rather expensive identify_system_timezone() procedure,
which we have no real need for during initdb since nothing done here depends
on the timezone setting.  Since we launch quite a few standalone backends
during the initdb sequence, this adds up to a significant savings, and seems
worth doing to save developer time even though it will hardly matter to end
users.  Per my report today on pgsql-hackers.

50wu/gpdb,snaga/postgres-xl,ashwinstar/gpdb,lisakowen/gpdb,Postgres-XL/Postgres-XL,jmcatamney/gpdb,50wu/gpdb,greenplum-db/gpdb,yazun/postgres-xl,yazun/postgres-xl,postmind-net/postgres-xl,lisakowen/gpdb,oberstet/postgres-xl,pavanvd/postgres-xl,oberstet/postgres-xl,ashwinstar/gpdb,postmind-net/postgres-xl,techdragon/Postgres-XL,snaga/postgres-xl,snaga/postgres-xl,xinzweb/gpdb,arcivanov/postgres-xl,50wu/gpdb,techdragon/Postgres-XL,techdragon/Postgres-XL,50wu/gpdb,zeroae/postgres-xl,techdragon/Postgres-XL,greenplum-db/gpdb,lisakowen/gpdb,kmjungersen/PostgresXL,snaga/postgres-xl,ovr/postgres-xl,oberstet/postgres-xl,lisakowen/gpdb,adam8157/gpdb,tpostgres-projects/tPostgres,greenplum-db/gpdb,tpostgres-projects/tPostgres,pavanvd/postgres-xl,xinzweb/gpdb,arcivanov/postgres-xl,adam8157/gpdb,jmcatamney/gpdb,ovr/postgres-xl,lisakowen/gpdb,pavanvd/postgres-xl,ashwinstar/gpdb,lisakowen/gpdb,adam8157/gpdb,postmind-net/postgres-xl,kmjungersen/PostgresXL,50wu/gpdb,arcivanov/postgres-xl,techdragon/Postgres-XL,yazun/postgres-xl,jmcatamney/gpdb,ovr/postgres-xl,tpostgres-projects/tPostgres,zeroae/postgres-xl,ashwinstar/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,zeroae/postgres-xl,xinzweb/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,adam8157/gpdb,pavanvd/postgres-xl,greenplum-db/gpdb,50wu/gpdb,Postgres-XL/Postgres-XL,ashwinstar/gpdb,jmcatamney/gpdb,jmcatamney/gpdb,arcivanov/postgres-xl,xinzweb/gpdb,snaga/postgres-xl,arcivanov/postgres-xl,pavanvd/postgres-xl,kmjungersen/PostgresXL,yazun/postgres-xl,greenplum-db/gpdb,greenplum-db/gpdb,adam8157/gpdb,50wu/gpdb,Postgres-XL/Postgres-XL,kmjungersen/PostgresXL,adam8157/gpdb,Postgres-XL/Postgres-XL,kmjungersen/PostgresXL,xinzweb/gpdb,adam8157/gpdb,adam8157/gpdb,ovr/postgres-xl,greenplum-db/gpdb,ovr/postgres-xl,xinzweb/gpdb,lisakowen/gpdb,ashwinstar/gpdb,50wu/gpdb,xinzweb/gpdb,zeroae/postgres-xl,arcivanov/postgres-xl,jmcatamney/gpdb,xinzweb/gpdb,lisakowen/gpdb,zeroae/postgres-xl,tpostgres-projects/tPostgres,oberstet/postgres-xl,postmind-net/postgres-xl,tpostgres-projects/tPostgres,Postgres-XL/Postgres-XL,oberstet/postgres-xl,postmind-net/postgres-xl,jmcatamney/gpdb,yazun/postgres-xl