Improve point allocations for each steps in the logql engine.

[cyriltovena]

Signed-off-by: Cyril Tovena cyril.tovena@gmail.com

❯ benchcmp old.txt new.txt
benchmark                         old ns/op      new ns/op      delta
BenchmarkRangeQuery100000-16      3177521        2690188        -15.34%
BenchmarkRangeQuery200000-16      13285761       11949290       -10.06%
BenchmarkRangeQuery500000-16      1925487305     1930636271     +0.27%
BenchmarkRangeQuery1000000-16     4044356716     3919126192     -3.10%

benchmark                         old allocs     new allocs     delta
BenchmarkRangeQuery100000-16      5239           5221           -0.34%
BenchmarkRangeQuery200000-16      5861           5793           -1.16%
BenchmarkRangeQuery500000-16      138631         138487         -0.10%
BenchmarkRangeQuery1000000-16     272012         271842         -0.06%

benchmark                         old bytes     new bytes     delta
BenchmarkRangeQuery100000-16      715357        696538        -2.63%
BenchmarkRangeQuery200000-16      1334607       1257068       -5.81%
BenchmarkRangeQuery500000-16      135321968     131401184     -2.90%
BenchmarkRangeQuery1000000-16     270956344     262054664     -3.29%

/cc @slim-bean

[codecov-commenter]

Codecov Report

Merging #2216 into master will decrease coverage by 0.01%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #2216      +/-   ##
==========================================
- Coverage   62.14%   62.12%   -0.02%     
==========================================
  Files         154      154              
  Lines       12457    12461       +4     
==========================================
  Hits         7741     7741              
- Misses       4108     4111       +3     
- Partials      608      609       +1     

Impacted Files	Coverage Δ
pkg/logql/engine.go	88.96% <50.00%> (-1.04%)	⬇️
pkg/querier/queryrange/downstreamer.go	95.87% <0.00%> (-2.07%)	⬇️
pkg/logql/evaluator.go	92.30% <0.00%> (-0.42%)	⬇️
pkg/ingester/transfer.go	66.90% <0.00%> (+1.40%)	⬆️