PHP 5.5 vs. PHP 7

php55-v-php7.md

Tests run on an HGV Vagrant using siege (3.0.5) with 25 concurrent users for 5 minutes.

• phpinfo() for PHP 5.5
• phpinfo() for PHP 7

WordPress (4.3.1)

TL;DR: PHP 7 was 2.6 times faster than PHP 5.5

PHP 5.5

Transactions:              4354 hits
Availability:              100.00 %
Elapsed time:              299.64 secs
Data transferred:          17.23 MB
Response time:             1.21 secs
Transaction rate:          14.53 trans/sec
Throughput:                0.06 MB/sec
Concurrency:               17.59
Successful transactions:   4354
Failed transactions:       0
Longest transaction:       2.04
Shortest transaction:      0.12

PHP 7

Transactions:              11333 hits
Availability:              100.00 %
Elapsed time:              299.38 secs
Data transferred:          44.84 MB
Response time:             0.16 secs
Transaction rate:          37.85 trans/sec
Throughput:                0.15 MB/sec
Concurrency:               6.16
Successful transactions:   11333
Failed transactions:       0
Longest transaction:       0.77
Shortest transaction:      0.02

WordPress (4.3.1) + WooCommerce (2.4.8)

TL;DR: PHP 7 was 1.4 times faster than PHP 5.5

PHP 5.5

Transactions:              427 hits
Availability:              100.00 %
Elapsed time:              299.27 secs
Data transferred:          2.73 MB
Response time:             16.61 secs
Transaction rate:          1.43 trans/sec
Throughput:                0.01 MB/sec
Concurrency:               23.70
Successful transactions:   427
Failed transactions:       0
Longest transaction:       22.29
Shortest transaction:      3.05

PHP 7

Transactions:              612 hits
Availability:              100.00 %
Elapsed time:              299.67 secs
Data transferred:          3.92 MB
Response time:             11.54 secs
Transaction rate:          2.04 trans/sec
Throughput:                0.01 MB/sec
Concurrency:               23.57
Successful transactions:   612
Failed transactions:       0
Longest transaction:       18.48
Shortest transaction:      2.39

WordPress (4.3.1) + bbPress (2.5.8)

TL;DR: PHP 7 was 6.6 times faster than PHP 5.5

PHP 5.5

Transactions:              680 hits
Availability:              100.00 %
Elapsed time:              299.29 secs
Data transferred:          3.54 MB
Response time:             10.29 secs
Transaction rate:          2.27 trans/sec
Throughput:                0.01 MB/sec
Concurrency:               23.39
Successful transactions:   680
Failed transactions:       0
Longest transaction:       12.39
Shortest transaction:      1.51

PHP 7

Transactions:              4521 hits
Availability:              100.00 %
Elapsed time:              299.28 secs
Data transferred:          23.52 MB
Response time:             1.15 secs
Transaction rate:          15.11 trans/sec
Throughput:                0.08 MB/sec
Concurrency:               17.38
Successful transactions:   4521
Failed transactions:       0
Longest transaction:       2.21
Shortest transaction:      0.60

WordPress (4.3.1) + BuddyPress (2.3.4)

TL;DR: PHP 7 was 4.7 times faster than PHP 5.5

PHP 5.5

Transactions:              318 hits
Availability:              100.00 %
Elapsed time:              299.60 secs
Data transferred:          3.14 MB
Response time:             22.16 secs
Transaction rate:          1.06 trans/sec
Throughput:                0.01 MB/sec
Concurrency:               23.52
Successful transactions:   318
Failed transactions:       0
Longest transaction:       25.49
Shortest transaction:      3.72

PHP 7

Transactions:              1488 hits
Availability:              100.00 %
Elapsed time:              299.96 secs
Data transferred:          14.68 MB
Response time:             4.51 secs
Transaction rate:          4.96 trans/sec
Throughput:                0.05 MB/sec
Concurrency:               22.39
Successful transactions:   1488
Failed transactions:       0
Longest transaction:       6.27
Shortest transaction:      0.57

@boogah

1. Thanks
2. How do you explain difference in results? Why WC was only 1.4 times faster and BP 4.7, for instance? How did you test WC: how many products, on which pages?
3. Thanks again

And about BuddyPress - which components were activated, what data was present in the DB for each of that component?