acelyc111 commented on PR #1610:
URL:
https://github.com/apache/incubator-pegasus/pull/1610#issuecomment-1722980512
This is the difference between without and with this patch on my develop
enviroment by command:
```
./run.sh bench --num 1000000 --thread_num 10
```
There is a little performance jitter and the difference is very small.
```diff --git a/without_the_patch b/with_the_patch
diff --git a/without_the_patch b/with_the_patch
index e4c4b1e..a8241f5 100644
--- a/without_the_patch
+++ b/with_the_patch
@@ -6,61 +6,64 @@ Values: 100 bytes each
Entries: 1000000
FileSize: 125 MB (estimated)
------------------------------------------------
-... finished 600000 ops
Statistics for write: s
-108.9833871 micros/op; 9175 ops/sec; 1.1543043701199116 MB/s
-Count: 10000000 Average: 1089.5418 StdDev: 392.73
-Min: 251 Median: 1041.3644 Max: 32637
-Percentiles: P50: 1041.36 P75: 1274.21 P99: 2715.24 P99.9: 3598.94 P99.99:
4340.74
+107.17954869999998 micros/op; 9330 ops/sec; 1.1737313837000698 MB/s
+Count: 10000000 Average: 1071.2726 StdDev: 428.70
+Min: 188 Median: 1022.1566 Max: 63136
+Percentiles: P50: 1022.16 P75: 1264.04 P99: 2734.62 P99.9: 4172.06 P99.99:
8402.93
------------------------------------------------------
-( 250, 380 ] 2149 0.021% 0.021%
-( 380, 580 ] 255741 2.557% 2.579% #
-( 580, 870 ] 2902205 29.022% 31.601% ######
-( 870, 1300 ] 4616823 46.168% 77.769% #########
-( 1300, 1900 ] 1763391 17.634% 95.403% ####
-( 1900, 2900 ] 441211 4.412% 99.815% #
-( 2900, 4400 ] 18199 0.182% 99.997%
-( 4400, 6600 ] 132 0.001% 99.999%
-( 6600, 9900 ] 99 0.001% 100.000%
-( 9900, 14000 ] 40 0.000% 100.000%
-( 22000, 33000 ] 10 0.000% 100.000%
+( 170, 250 ] 715 0.007% 0.007%
+( 250, 380 ] 59628 0.596% 0.603%
+( 380, 580 ] 425450 4.255% 4.858% #
+( 580, 870 ] 2941615 29.416% 34.274% ######
+( 870, 1300 ] 4444200 44.442% 78.716% #########
+( 1300, 1900 ] 1683032 16.830% 95.546% ###
+( 1900, 2900 ] 413791 4.138% 99.684% #
+( 2900, 4400 ] 25434 0.254% 99.939%
+( 4400, 6600 ] 4239 0.042% 99.981%
+( 6600, 9900 ] 1640 0.016% 99.997%
+( 9900, 14000 ] 223 0.002% 100.000%
+( 14000, 22000 ] 22 0.000% 100.000%
+( 22000, 33000 ] 1 0.000% 100.000%
+( 50000, 75000 ] 10 0.000% 100.000%
Statistics for read: ps
-32.24271819999999 micros/op; 31014 ops/sec; 3.90165615751342 MB/s (1000000
of 1000000 found) (1000000 of 1000000 found) (1000000 of 1000000 found)
(1000000 of 1000000 found) (1000000 of 1000000 found) (1000000 of 1000000
found) (1000000 of 1000000 found) (1000000 of 1000000 found) (1000000 of
1000000 found) (1000000 of 1000000 found)
-Count: 10000000 Average: 322.2425 StdDev: 67.90
-Min: 112 Median: 319.7637 Max: 8046
-Percentiles: P50: 319.76 P75: 366.80 P99: 570.87 P99.9: 721.83 P99.99:
867.51
+31.3435503 micros/op; 31904 ops/sec; 4.01358489373171 MB/s (1000000 of
1000000 found) (1000000 of 1000000 found) (1000000 of 1000000 found) (1000000
of 1000000 found) (1000000 of 1000000 found) (1000000 of 1000000 found)
(1000000 of 1000000 found) (1000000 of 1000000 found) (1000000 of 1000000
found) (1000000 of 1000000 found)
+Count: 10000000 Average: 313.2271 StdDev: 88.74
+Min: 54 Median: 315.0624 Max: 18272
+Percentiles: P50: 315.06 P75: 363.26 P99: 570.11 P99.9: 769.63 P99.99:
2541.81
------------------------------------------------------
-( 110, 170 ] 7719 0.077% 0.077%
-( 170, 250 ] 1284654 12.847% 12.924% ###
-( 250, 380 ] 6908917 69.089% 82.013% ##############
-( 380, 580 ] 1779948 17.799% 99.812% ####
-( 580, 870 ] 17916 0.179% 99.992%
-( 870, 1300 ] 580 0.006% 99.997%
-( 1300, 1900 ] 201 0.002% 99.999%
-( 1900, 2900 ] 27 0.000% 100.000%
-( 2900, 4400 ] 24 0.000% 100.000%
-( 4400, 6600 ] 7 0.000% 100.000%
-( 6600, 9900 ] 7 0.000% 100.000%
+( 51, 76 ] 1762 0.018% 0.018%
+( 76, 110 ] 93866 0.939% 0.956%
+( 110, 170 ] 354520 3.545% 4.501% #
+( 170, 250 ] 1175298 11.753% 16.254% ##
+( 250, 380 ] 6742634 67.426% 83.681% #############
+( 380, 580 ] 1611617 16.116% 99.797% ###
+( 580, 870 ] 15756 0.158% 99.955%
+( 870, 1300 ] 2006 0.020% 99.975%
+( 1300, 1900 ] 1059 0.011% 99.985%
+( 1900, 2900 ] 751 0.008% 99.993%
+( 2900, 4400 ] 521 0.005% 99.998%
+( 4400, 6600 ] 141 0.001% 99.999%
+( 6600, 9900 ] 39 0.000% 100.000%
+( 9900, 14000 ] 20 0.000% 100.000%
+( 14000, 22000 ] 10 0.000% 100.000%
Statistics for delete:
-106.3613042 micros/op; 9401 ops/sec;
-Count: 10000000 Average: 1063.1975 StdDev: 386.62
-Min: 249 Median: 1014.1278 Max: 41105
-Percentiles: P50: 1014.13 P75: 1255.56 P99: 2685.36 P99.9: 3430.81 P99.99:
4327.29
+106.3612982 micros/op; 9401 ops/sec;
+Count: 10000000 Average: 1062.9884 StdDev: 378.81
+Min: 269 Median: 1017.5398 Max: 13558
+Percentiles: P50: 1017.54 P75: 1255.64 P99: 2671.50 P99.9: 3304.20 P99.99:
4310.24
------------------------------------------------------
-( 170, 250 ] 1 0.000% 0.000%
-( 250, 380 ] 1987 0.020% 0.020%
-( 380, 580 ] 295886 2.959% 2.979% #
-( 580, 870 ] 3209727 32.097% 35.076% ######
-( 870, 1300 ] 4452518 44.525% 79.601% #########
-( 1300, 1900 ] 1630076 16.301% 95.902% ###
-( 1900, 2900 ] 394476 3.945% 99.847% #
-( 2900, 4400 ] 15059 0.151% 99.997%
-( 4400, 6600 ] 122 0.001% 99.999%
-( 6600, 9900 ] 77 0.001% 99.999%
-( 9900, 14000 ] 41 0.000% 100.000%
-( 14000, 22000 ] 20 0.000% 100.000%
-( 33000, 50000 ] 10 0.000% 100.000%
+( 250, 380 ] 1938 0.019% 0.019%
+( 380, 580 ] 302185 3.022% 3.041% #
+( 580, 870 ] 3146732 31.467% 34.509% ######
+( 870, 1300 ] 4514932 45.149% 79.658% #########
+( 1300, 1900 ] 1642549 16.425% 96.083% ###
+( 1900, 2900 ] 378048 3.780% 99.864% #
+( 2900, 4400 ] 13419 0.134% 99.998%
+( 4400, 6600 ] 96 0.001% 99.999%
+( 6600, 9900 ] 70 0.001% 100.000%
+( 9900, 14000 ] 31 0.000% 100.000%
dsn exit with code 0
```
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