| Issue |
136568
|
| Summary |
Quadratic scaling in processing of designated initializers
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
amonakov
|
```sh
printf 'x(%d)\n' $(seq 10000) > x10000.h
```
```c
struct S {
#define x(n) int m##n;
#include "x10000.h"
#undef x
} s = {
#define x(n) .m##n = n,
#include "x10000.h"
#undef x
};
```
needs more than a second to compile, and scales quadratically with the number of fields. `perf report` shows 42% in CheckDesignatedInitializer, 34% in CheckStructUnionTypes and 17.5% in FieldDecl::getCanonicalDecl.
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