tree d1ee07ea7b234023207a81378c999a4d1a81cc88
parent 0a9916800531085e3e9f782577efd28fbc85468c
author Jake Weinstein <xboxlover360@gmail.com> 1486875706 -0500
committer Meninblack007 <sanyam.53jain@gmail.com> 1490800427 +0530

libc: import ARM strlen from Apple C library

* Significant improvements across the board

* Tested on Nextbit Robin (MSM8992)

Before:
                                       iterations      ns/op
BM_string_strlen/8                            20M        126    0.063 GiB/s
BM_string_strlen/64                            5M        316    0.202 GiB/s
BM_string_strlen/512                        1000k       1641    0.312 GiB/s
BM_string_strlen/1024                        500k       3154    0.325 GiB/s
BM_string_strlen/8Ki                         100k      24688    0.332 GiB/s
BM_string_strlen/16Ki                         50k      48604    0.337 GiB/s
BM_string_strlen/32Ki                         20k      97577    0.336 GiB/s
BM_string_strlen/64Ki                         10k     200116    0.327 GiB/s

After:
                                       iterations      ns/op
BM_string_strlen/8                            50M         13    0.576 GiB/s
BM_string_strlen/64                           50M         39    1.604 GiB/s
BM_string_strlen/512                          10M        163    3.138 GiB/s
BM_string_strlen/1024                          5M        303    3.370 GiB/s
BM_string_strlen/8Ki                        1000k       2275    3.600 GiB/s
BM_string_strlen/16Ki                        500k       4531    3.616 GiB/s
BM_string_strlen/32Ki                        200k       9487    3.454 GiB/s
BM_string_strlen/64Ki                        100k      22854    2.868 GiB/s

Change-Id: I735d5cfe6e908f52104647492442a8f3d01acf99