| commit | b10d3f93b689a0b39fbc861d8d367491b4442a4f | [log] [tgz] |
|---|---|---|
| author | Protobuf Team Bot <protobuf-github-bot@google.com> | Thu Dec 14 22:16:21 2023 -0800 |
| committer | Copybara-Service <copybara-worker@google.com> | Thu Dec 14 22:20:28 2023 -0800 |
| tree | edb25eb18838ba84de87480ea1255013b18c35d2 | |
| parent | 220415ddfb59d16c9309e5bae37bed3be0943a25 [diff] |
Avoid interface calls in hot loop
Before, every charAt would emit (on android):
```
0x00002104 adrp x17, #+0x1000 (addr 0x3000)
0x00002108 ldr w17, [x17, #20]
0x0000210c ldr x0, [x0, #128]
0x00002110 ldr x0, [x0, #328]
0x00002114 ldr lr, [x0, #24]
0x00002118 blr lr <-- Call into String.charAt(int)
```
Now, it emits the inlined implementation of charAt (branch is for possibly compressed strings):
```
0x000020b4 ldur w16, [x4, #-8]
0x000020b8 tbnz w16, #0, #+0xc (addr 0x20c4)
0x000020bc ldrb w4, [x4, x0]
0x000020c0 b #+0x8 (addr 0x20c8)
0x000020c4 ldrh w4, [x4, x0, lsl #1]
```
PiperOrigin-RevId: 591147406
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