commit dcabf2c060f1eaed2530792790f4cb8875a814d4
author Rosica Dejanovska <rosica@google.com> Wed Jan 26 16:59:57 2022 +0000
committer Marcel Hlopko <hlopko@google.com> Fri Mar 25 22:15:53 2022 +0000
tree 2affa204b0116f96b0fca20864a8d957c485b51a
parent 63f10da0f57dd7e3ab17035bbfd8b549acadcc88

Use a depset of strings instead of TargetAndHeaderInfo

We can pass the depset of strings to a build variable and have it flattened at execution time. This significantly reduces memory consumption in analysis phase.

Example analysis phase metrics before and after this change on `//superroot/servers:sr_www`:
```
metric       mean               median              stddev        1-pval
cpu:       2612.022s           2637.130s            82.964
memory:    36217MB             36218MB              0.800
system:    109.650s            110.240s             3.107
wall:      61.176s             61.635s              1.891

metric       mean               median              stddev        1-pval
cpu:     1932.974s (-26.00%)   1933.75s (-26.67%)   43.799    0.99622 (significant)
memory:  9920MB (-72.61%)      9920MB (-72.61%)     0.632     0.99622 (significant)
system:  100.272s (-8.55%)     100.750s (-8.61%)    3.082     0.99622 (significant)
wall:    48.148s  (-21.29%)    46.594s (-24.40%)    2.443     0.99622 (significant)
```
PiperOrigin-RevId: 424361043