taiyang-li commented on PR #1375:
URL: https://github.com/apache/orc/pull/1375#issuecomment-1758990062
@wpleonardo still find no improvement if just select int type columns.
Q: `select
reporttime,appid,uid,platform,nettype,clientversioncode,sdkversioncode,statversion,heartcount,msgcount,giftcount,barragecount,entrytype,prefetchedms,linkdstate,networkavailable,starttimestamp,sessionlogints,medialogints,sdkboundts,msconnectedts,vsconnectedts,firstiframets,ownerstatus,stopreason,totaltime,cpuusageavg,memusageavg,backgroundtotal,foregroundtotal,firstvideopackts,firstvoicerecvts,firstvoiceplayts,firstiframeassemblets,uiinitts,uiloadedts,uiappearedts,setvideoviewts,blurviewdimissts,preparesdkinqueuets,preparesdkexects,startsdkinqueuets,startsdkexects,sdkjoinchannelinqueuets,sdkjoinchannelexects,lastsdkleavechannelinqueuets,lastsdkleavechannelexects,unused_1,unused_2,setvideoviewinqueuets,setvideoviewexects,livetype,audiostatus,firstiframesize,firstiframedecodetime,extras,entrancetype,entrancemode,mclientip,mnc,mcc,vsipsuccess,msipsuccess,vsipfail,msipfail,mediaflag,proxyflag,redirectcount,directorrescode,playcentertype,videomutetype,owneruid
from file('tes
t.orc') format Null;`
with avx512:
```
0 rows in set. Elapsed: 1.629 sec. Processed 1.20 million rows, 1.90 GB
(738.86 thousand rows/s., 1.17 GB/s.)
0 rows in set. Elapsed: 1.698 sec. Processed 1.20 million rows, 1.90 GB
(708.46 thousand rows/s., 1.12 GB/s.)
0 rows in set. Elapsed: 1.572 sec. Processed 1.20 million rows, 1.90 GB
(765.62 thousand rows/s., 1.21 GB/s.)
```
without avx512
```
0 rows in set. Elapsed: 1.403 sec. Processed 1.20 million rows, 1.90 GB
(857.57 thousand rows/s., 1.36 GB/s.)
0 rows in set. Elapsed: 1.505 sec. Processed 1.20 million rows, 1.90 GB
(799.62 thousand rows/s., 1.26 GB/s.)
0 rows in set. Elapsed: 1.414 sec. Processed 1.20 million rows, 1.90 GB
(851.23 thousand rows/s., 1.35 GB/s.)
```
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