tree bace171451fec7bccf1158b74cca7ec1cb81491b
parent 54cf188dabc61373286189739f54cfb925d2cdac
author Mike Burrows <m3b@google.com> 1438725568 -0700
committer Mike Burrows <m3b@google.com> 1438725568 -0700

v.io/v23/vom/internal: Vom benchmarks.   No new functionality.

(This is the second part of the CL, needed to check in the javascript form
of the compiled VDL.  :-(  )

This CL adds benchmarks for vom, which marshal and unmarhsal an arbitrarily-chosen
"customer record" struct, with a few strings and integers in it.

The test measures the number of allocations and time used for:
        - encoding vs decoding
        - using vom.Encode/vom.Decode vs vom.Encoder.Encode/vom.Decoder.Decode
        - processing a single customer record vs a thousand
        - vom vs gob

The comments at the top of the source give comparisons with C++ and Go
protocol buffers.

Typical output (including CL 14185):

$ v23 go test -bench . v.io/v23/vom/internal
Allocations per vom.Encode                         :    572
Allocations per vom.Decode                         :    405
Allocations per vom.Encoder.Encode    (1 Customer) :    572
Allocations per vom.Encoder.Encode (1000 Customers):  74509
Allocations per vom.Decoder.Decode    (1 Customer) :   4469
Allocations per vom.Decoder.Decode (1000 Customers): 405068
Allocations per gob.Encoder.Encode    (1 Customer) :     53
Allocations per gob.Encoder.Encode (1000 Customers):   3073
Allocations per gob.Decoder.Decode    (1 Customer) :    523
Allocations per gob.Decoder.Decode (1000 Customers):  14512
PASS
BenchmarkVomEncodeCustomer         10000            149089 ns/op
BenchmarkVomDecodeCustomer         20000             95148 ns/op
BenchmarkVomEncoder1Customer       10000            150061 ns/op
BenchmarkVomEncoder1000Customer      100          18691021 ns/op
BenchmarkVomDecoder1Customer        2000            997658 ns/op
BenchmarkVomDecoder1000Customer       20          85232430 ns/op
BenchmarkGobEncoder1Customer       50000             30675 ns/op
BenchmarkGobEncoder1000Customer      300           4227359 ns/op
BenchmarkGobDecoder1Customer       10000            111041 ns/op
BenchmarkGobDecoder1000Customer      500           3621498 ns/op
ok      v.io/v23/vom/internal   19.863s
$

Without CL 14185, the vom/Decode lines are different:

Allocations per vom.Decode                         :   4469
BenchmarkVomDecodeCustomer          2000           1007225 ns/op

MultiPart: 2/2
Change-Id: I47f2422e73fb0e22e0a5eec6fc038d1031517b16