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Perf: use term hashmap in fastfield #2243

Merged
merged 5 commits into from Nov 9, 2023
Merged

Perf: use term hashmap in fastfield #2243

merged 5 commits into from Nov 9, 2023

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PSeitz
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@PSeitz PSeitz commented Nov 9, 2023 •
edited

Faster indexing + Lower Memory consumption + Less allocations

  • add shared arena hashmap
  • bench fastfield indexing
  • use shared arena hashmap in columnar
  • lower minimum resize to 1<<3 in term hashmap
 index-hdfs/index-hdfs-no-commit-only-FAST
                        time:   [97.217 ms 98.820 ms 100.69 ms]
                        thrpt:  [212.22 MiB/s 216.24 MiB/s 219.81 MiB/s]
                 change:
                        time:   [-43.555% -40.996% -38.348%] (p = 0.00 < 0.05)
                        thrpt:  [+62.202% +69.480% +77.163%]
                        Performance has improved.

index-hdfs/index-hdfs-with-commit-only-FAST
                        time:   [177.69 ms 182.69 ms 188.42 ms]
                        thrpt:  [113.41 MiB/s 116.97 MiB/s 120.26 MiB/s]
                 change:
                        time:   [-22.793% -20.433% -17.976%] (p = 0.00 < 0.05)
                        thrpt:  [+21.915% +25.679% +29.521%]
                        Performance has improved.

index-hdfs/index-hdfs-no-commit-json-without-docstore (no ff)
                        time:   [453.40 ms 465.27 ms 477.92 ms]
                        thrpt:  [44.712 MiB/s 45.928 MiB/s 47.131 MiB/s]
                 change:
                        time:   [-4.2451% -1.3006% +1.9388%] (p = 0.44 > 0.05)
                        thrpt:  [-1.9019% +1.3177% +4.4334%]
                        No change in performance detected.

index-gh/index-gh-no-commit
                        time:   [48.227 ms 48.766 ms 49.341 ms]
                        thrpt:  [45.815 MiB/s 46.356 MiB/s 46.873 MiB/s]
                 change:
                        time:   [-23.855% -22.003% -20.074%] (p = 0.00 < 0.05)
                        thrpt:  [+25.116% +28.209% +31.328%]
                        Performance has improved.

index-gh/index-gh-fast  time:   [18.293 ms 18.679 ms 19.089 ms]
                        thrpt:  [118.42 MiB/s 121.03 MiB/s 123.57 MiB/s]
                 change:
                        time:   [-26.113% -24.553% -22.710%] (p = 0.00 < 0.05)
                        thrpt:  [+29.383% +32.543% +35.342%]
                        Performance has improved.


index-gh/index-gh-with-commit
                        time:   [101.85 ms 103.74 ms 105.75 ms]
                        thrpt:  [21.376 MiB/s 21.791 MiB/s 22.196 MiB/s]
                 change:
                        time:   [-17.899% -15.228% -12.681%] (p = 0.00 < 0.05)
                        thrpt:  [+14.523% +17.963% +21.802%]
                        Performance has improved.


index-wiki/index-wiki-no-commit
                        time:   [26.359 ms 26.873 ms 27.390 ms]
                        thrpt:  [40.285 MiB/s 41.061 MiB/s 41.861 MiB/s]
                 change:
                        time:   [-7.2213% -5.2060% -3.5958%] (p = 0.00 < 0.05)
                        thrpt:  [+3.7299% +5.4919% +7.7834%]
                        Performance has improved.

index-wiki/index-wiki-with-commit
                        time:   [52.138 ms 52.674 ms 53.206 ms]
                        thrpt:  [20.739 MiB/s 20.948 MiB/s 21.164 MiB/s]
                 change:
                        time:   [-11.533% -10.166% -8.7357%] (p = 0.00 < 0.05)
                        thrpt:  [+9.5719% +11.316% +13.036%]
                        Performance has improved.

@PSeitz PSeitz changed the title use term hashmap in fastfield text Perf: use term hashmap in fastfield text Nov 9, 2023
@PSeitz PSeitz changed the title Perf: use term hashmap in fastfield text Perf: use term hashmap in fastfield Nov 9, 2023
fulmicoton
fulmicoton reviewed Nov 9, 2023
View reviewed changes
stacker/src/arena_hashmap.rs
@@ -57,60 +11,8 @@ impl KeyValue {
/// the computation of the hash of the key twice,
/// or copying the key as long as there is no insert.
pub struct ArenaHashMap {
table: Vec<KeyValue>,
shared_arena_hashmap: SharedArenaHashMap,
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@fulmicoton fulmicoton Nov 9, 2023 •
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can you relationship between ArenaHashMap vs SharedArenaHashMap?

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@PSeitz PSeitz Nov 9, 2023 •
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I added some comments to clarify

/// SharedArenaHashMap is like ArenaHashMap but gets the memory arena
/// passed as an argument to the methods.
/// So one MemoryArena can be shared with multiple SharedArenaHashMap.

@PSeitz PSeitz merged commit 927b443 into main Nov 9, 2023
4 checks passed
@PSeitz PSeitz deleted the term_hash_map branch November 9, 2023 12:44
PSeitz added a commit that referenced this pull request Apr 10, 2024
@PSeitz
Perf: use term hashmap in fastfield (#2243)
b85b3fc 
* add shared arena hashmap

* bench fastfield indexing

* use shared arena hashmap in columnar

lower minimum resize in hashtable

* clippy

* add comments
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@fulmicoton fulmicoton fulmicoton approved these changes

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@PSeitz @fulmicoton