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Adding lighter String processing methods to Strings#10640

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dougqh/strings-improvements
Open

Adding lighter String processing methods to Strings#10640
dougqh wants to merge 14 commits intomasterfrom
dougqh/strings-improvements

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@dougqh
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@dougqh dougqh commented Feb 19, 2026 •
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What Does This Do

Adds to StringUtils

  • fast replaceAll for a fixed string & replacement, 3x throughput compared to regex based solutions, 1/2x allocation compared to compiled regex solutions
  • added SubSequence which provides a view into a subsequence of a String without incurring significant extra allocation
  • Strings.spliit returns an Iterable can be used to do light weight simple String parsing

Motivation

In subsequent PRs, these will be used to reduce allocation from String processing throughout dd-trace-java
The first focus area for improvement is QueryObfuscator

Additional Notes

Contributor Checklist

Jira ticket: [PROJ-IDENT]

Note: Once your PR is ready to merge, add it to the merge queue by commenting /merge. /merge -c cancels the queue request. /merge -f --reason "reason" skips all merge queue checks; please use this judiciously, as some checks do not run at the PR-level. For more information, see this doc.

@dougqh
Adding to StringUtiils
e729013 
- fast replaceAll for a fixed string & replacement, 3x throughput compared to regex based solutions, 1/2x allocation compared to regex solutions

- added SubSequence which provides a view into a subsequence of a String without incurring extra allocation

- Strings.spliit returns an Iterable<SubSequence> can be used to do light weight processing of a String
@dougqh dougqh requested a review from a team as a code owner February 19, 2026 15:38
@dougqh dougqh added type: enhancement Enhancements and improvements comp: core Tracer core tag: performance Performance related changes labels Feb 19, 2026
@dougqh dougqh changed the title Adding lighter String processing methods to StringUtiils Adding lighter String processing methods to Strings Feb 19, 2026
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pr-commenter bot commented Feb 19, 2026 •
edited
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Benchmarks

Startup

Parameters

Baseline Candidate
baseline_or_candidate baseline candidate
git_branch master dougqh/strings-improvements
git_commit_date 1771938460 1772033530
git_commit_sha be0482d a149be6
release_version 1.60.0-SNAPSHOT~be0482d740 1.60.0-SNAPSHOT~a149be6159
See matching parameters
Baseline Candidate
application insecure-bank insecure-bank
ci_job_date 1772035257 1772035257
ci_job_id 1455626240 1455626240
ci_pipeline_id 98884345 98884345
cpu_model Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version Linux runner-zfyrx7zua-project-304-concurrent-0-4l62ugsh 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux Linux runner-zfyrx7zua-project-304-concurrent-0-4l62ugsh 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
module Agent Agent
parent None None

Summary

Found 0 performance improvements and 0 performance regressions! Performance is the same for 64 metrics, 7 unstable metrics.

Startup time reports for insecure-bank 
gantt
    title insecure-bank - global startup overhead: candidate=1.60.0-SNAPSHOT~a149be6159, baseline=1.60.0-SNAPSHOT~be0482d740

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.064 s) : 0, 1064190
Total [baseline] (8.753 s) : 0, 8753159
Agent [candidate] (1.063 s) : 0, 1063032
Total [candidate] (8.744 s) : 0, 8743521
section iast
Agent [baseline] (1.228 s) : 0, 1228434
Total [baseline] (9.407 s) : 0, 9407457
Agent [candidate] (1.235 s) : 0, 1235249
Total [candidate] (9.376 s) : 0, 9376224
Loading
  • baseline results
Module Variant Duration Δ tracing
Agent tracing 1.064 s -
Agent iast 1.228 s 164.244 ms (15.4%)
Total tracing 8.753 s -
Total iast 9.407 s 654.297 ms (7.5%)
  • candidate results
Module Variant Duration Δ tracing
Agent tracing 1.063 s -
Agent iast 1.235 s 172.218 ms (16.2%)
Total tracing 8.744 s -
Total iast 9.376 s 632.703 ms (7.2%) 
gantt
    title insecure-bank - break down per module: candidate=1.60.0-SNAPSHOT~a149be6159, baseline=1.60.0-SNAPSHOT~be0482d740

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.213 ms) : 0, 1213
crashtracking [candidate] (1.216 ms) : 0, 1216
BytebuddyAgent [baseline] (627.92 ms) : 0, 627920
BytebuddyAgent [candidate] (627.809 ms) : 0, 627809
AgentMeter [baseline] (29.097 ms) : 0, 29097
AgentMeter [candidate] (29.015 ms) : 0, 29015
GlobalTracer [baseline] (257.887 ms) : 0, 257887
GlobalTracer [candidate] (257.463 ms) : 0, 257463
AppSec [baseline] (32.935 ms) : 0, 32935
AppSec [candidate] (32.873 ms) : 0, 32873
Debugger [baseline] (62.85 ms) : 0, 62850
Debugger [candidate] (62.043 ms) : 0, 62043
Remote Config [baseline] (618.104 µs) : 0, 618
Remote Config [candidate] (611.598 µs) : 0, 612
Telemetry [baseline] (11.598 ms) : 0, 11598
Telemetry [candidate] (9.028 ms) : 0, 9028
Flare Poller [baseline] (3.764 ms) : 0, 3764
Flare Poller [candidate] (6.878 ms) : 0, 6878
section iast
crashtracking [baseline] (1.201 ms) : 0, 1201
crashtracking [candidate] (1.21 ms) : 0, 1210
BytebuddyAgent [baseline] (793.901 ms) : 0, 793901
BytebuddyAgent [candidate] (798.889 ms) : 0, 798889
AgentMeter [baseline] (11.269 ms) : 0, 11269
AgentMeter [candidate] (11.301 ms) : 0, 11301
GlobalTracer [baseline] (246.809 ms) : 0, 246809
GlobalTracer [candidate] (247.821 ms) : 0, 247821
AppSec [baseline] (31.53 ms) : 0, 31530
AppSec [candidate] (33.804 ms) : 0, 33804
Debugger [baseline] (68.259 ms) : 0, 68259
Debugger [candidate] (66.182 ms) : 0, 66182
Remote Config [baseline] (546.176 µs) : 0, 546
Remote Config [candidate] (536.626 µs) : 0, 537
Telemetry [baseline] (8.563 ms) : 0, 8563
Telemetry [candidate] (8.646 ms) : 0, 8646
Flare Poller [baseline] (3.484 ms) : 0, 3484
Flare Poller [candidate] (3.52 ms) : 0, 3520
IAST [baseline] (26.735 ms) : 0, 26735
IAST [candidate] (27.116 ms) : 0, 27116
Loading
Startup time reports for petclinic 
gantt
    title petclinic - global startup overhead: candidate=1.60.0-SNAPSHOT~a149be6159, baseline=1.60.0-SNAPSHOT~be0482d740

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.067 s) : 0, 1067317
Total [baseline] (10.936 s) : 0, 10935911
Agent [candidate] (1.073 s) : 0, 1072785
Total [candidate] (11.027 s) : 0, 11027338
section appsec
Agent [baseline] (1.24 s) : 0, 1240374
Total [baseline] (11.01 s) : 0, 11010448
Agent [candidate] (1.24 s) : 0, 1239859
Total [candidate] (10.947 s) : 0, 10946776
section iast
Agent [baseline] (1.233 s) : 0, 1232983
Total [baseline] (11.195 s) : 0, 11194539
Agent [candidate] (1.232 s) : 0, 1232104
Total [candidate] (11.166 s) : 0, 11166210
section profiling
Agent [baseline] (1.196 s) : 0, 1195731
Total [baseline] (10.902 s) : 0, 10901853
Agent [candidate] (1.192 s) : 0, 1191595
Total [candidate] (10.978 s) : 0, 10977732
Loading
  • baseline results
Module Variant Duration Δ tracing
Agent tracing 1.067 s -
Agent appsec 1.24 s 173.057 ms (16.2%)
Agent iast 1.233 s 165.667 ms (15.5%)
Agent profiling 1.196 s 128.414 ms (12.0%)
Total tracing 10.936 s -
Total appsec 11.01 s 74.537 ms (0.7%)
Total iast 11.195 s 258.628 ms (2.4%)
Total profiling 10.902 s -34.058 ms (-0.3%)
  • candidate results
Module Variant Duration Δ tracing
Agent tracing 1.073 s -
Agent appsec 1.24 s 167.074 ms (15.6%)
Agent iast 1.232 s 159.319 ms (14.9%)
Agent profiling 1.192 s 118.81 ms (11.1%)
Total tracing 11.027 s -
Total appsec 10.947 s -80.562 ms (-0.7%)
Total iast 11.166 s 138.872 ms (1.3%)
Total profiling 10.978 s -49.606 ms (-0.4%) 
gantt
    title petclinic - break down per module: candidate=1.60.0-SNAPSHOT~a149be6159, baseline=1.60.0-SNAPSHOT~be0482d740

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.195 ms) : 0, 1195
crashtracking [candidate] (1.219 ms) : 0, 1219
BytebuddyAgent [baseline] (628.425 ms) : 0, 628425
BytebuddyAgent [candidate] (631.758 ms) : 0, 631758
AgentMeter [baseline] (29.202 ms) : 0, 29202
AgentMeter [candidate] (29.246 ms) : 0, 29246
GlobalTracer [baseline] (258.004 ms) : 0, 258004
GlobalTracer [candidate] (259.089 ms) : 0, 259089
AppSec [baseline] (33.004 ms) : 0, 33004
AppSec [candidate] (32.996 ms) : 0, 32996
Debugger [baseline] (66.193 ms) : 0, 66193
Debugger [candidate] (66.443 ms) : 0, 66443
Remote Config [baseline] (616.111 µs) : 0, 616
Remote Config [candidate] (607.133 µs) : 0, 607
Telemetry [baseline] (9.982 ms) : 0, 9982
Telemetry [candidate] (9.954 ms) : 0, 9954
Flare Poller [baseline] (4.503 ms) : 0, 4503
Flare Poller [candidate] (5.261 ms) : 0, 5261
section appsec
crashtracking [baseline] (1.2 ms) : 0, 1200
crashtracking [candidate] (1.199 ms) : 0, 1199
BytebuddyAgent [baseline] (657.775 ms) : 0, 657775
BytebuddyAgent [candidate] (658.97 ms) : 0, 658970
AgentMeter [baseline] (11.943 ms) : 0, 11943
AgentMeter [candidate] (11.913 ms) : 0, 11913
GlobalTracer [baseline] (258.777 ms) : 0, 258777
GlobalTracer [candidate] (257.864 ms) : 0, 257864
AppSec [baseline] (168.3 ms) : 0, 168300
AppSec [candidate] (168.144 ms) : 0, 168144
Debugger [baseline] (66.905 ms) : 0, 66905
Debugger [candidate] (66.514 ms) : 0, 66514
Remote Config [baseline] (656.852 µs) : 0, 657
Remote Config [candidate] (659.584 µs) : 0, 660
Telemetry [baseline] (9.531 ms) : 0, 9531
Telemetry [candidate] (9.38 ms) : 0, 9380
Flare Poller [baseline] (3.776 ms) : 0, 3776
Flare Poller [candidate] (3.654 ms) : 0, 3654
IAST [baseline] (25.46 ms) : 0, 25460
IAST [candidate] (25.434 ms) : 0, 25434
section iast
crashtracking [baseline] (1.2 ms) : 0, 1200
crashtracking [candidate] (1.189 ms) : 0, 1189
BytebuddyAgent [baseline] (796.636 ms) : 0, 796636
BytebuddyAgent [candidate] (795.912 ms) : 0, 795912
AgentMeter [baseline] (11.293 ms) : 0, 11293
AgentMeter [candidate] (11.27 ms) : 0, 11270
GlobalTracer [baseline] (247.727 ms) : 0, 247727
GlobalTracer [candidate] (247.435 ms) : 0, 247435
AppSec [baseline] (34.857 ms) : 0, 34857
AppSec [candidate] (35.887 ms) : 0, 35887
Debugger [baseline] (65.381 ms) : 0, 65381
Debugger [candidate] (64.743 ms) : 0, 64743
Remote Config [baseline] (550.176 µs) : 0, 550
Remote Config [candidate] (538.62 µs) : 0, 539
Telemetry [baseline] (8.691 ms) : 0, 8691
Telemetry [candidate] (8.62 ms) : 0, 8620
Flare Poller [baseline] (3.422 ms) : 0, 3422
Flare Poller [candidate] (3.44 ms) : 0, 3440
IAST [baseline] (27.056 ms) : 0, 27056
IAST [candidate] (26.992 ms) : 0, 26992
section profiling
crashtracking [baseline] (1.202 ms) : 0, 1202
crashtracking [candidate] (1.165 ms) : 0, 1165
BytebuddyAgent [baseline] (684.576 ms) : 0, 684576
BytebuddyAgent [candidate] (681.302 ms) : 0, 681302
AgentMeter [baseline] (8.577 ms) : 0, 8577
AgentMeter [candidate] (8.546 ms) : 0, 8546
GlobalTracer [baseline] (216.103 ms) : 0, 216103
GlobalTracer [candidate] (216.082 ms) : 0, 216082
AppSec [baseline] (32.629 ms) : 0, 32629
AppSec [candidate] (32.532 ms) : 0, 32532
Debugger [baseline] (67.375 ms) : 0, 67375
Debugger [candidate] (67.443 ms) : 0, 67443
Remote Config [baseline] (641.08 µs) : 0, 641
Remote Config [candidate] (644.212 µs) : 0, 644
Telemetry [baseline] (9.083 ms) : 0, 9083
Telemetry [candidate] (9.192 ms) : 0, 9192
Flare Poller [baseline] (3.806 ms) : 0, 3806
Flare Poller [candidate] (3.788 ms) : 0, 3788
ProfilingAgent [baseline] (100.69 ms) : 0, 100690
ProfilingAgent [candidate] (100.17 ms) : 0, 100170
Profiling [baseline] (101.268 ms) : 0, 101268
Profiling [candidate] (100.742 ms) : 0, 100742
Loading

Load

Parameters

Baseline Candidate
baseline_or_candidate baseline candidate
git_branch master dougqh/strings-improvements
git_commit_date 1771938460 1772033530
git_commit_sha be0482d a149be6
release_version 1.60.0-SNAPSHOT~be0482d740 1.60.0-SNAPSHOT~a149be6159
See matching parameters
Baseline Candidate
application insecure-bank insecure-bank
ci_job_date 1772035833 1772035833
ci_job_id 1455626241 1455626241
ci_pipeline_id 98884345 98884345
cpu_model Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version Linux runner-zfyrx7zua-project-304-concurrent-0-gckbkgsy 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux Linux runner-zfyrx7zua-project-304-concurrent-0-gckbkgsy 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Summary

Found 0 performance improvements and 3 performance regressions! Performance is the same for 17 metrics, 16 unstable metrics.

scenario Δ mean agg_http_req_duration_p50 Δ mean agg_http_req_duration_p95 Δ mean throughput candidate mean agg_http_req_duration_p50 candidate mean agg_http_req_duration_p95 candidate mean throughput baseline mean agg_http_req_duration_p50 baseline mean agg_http_req_duration_p95 baseline mean throughput
scenario:load:insecure-bank:iast:high_load worse
[+48.527µs; +128.739µs] or [+2.002%; +5.310%]		 unsure
[+53.151µs; +442.568µs] or [+0.747%; +6.222%]		 unstable
[-210.648op/s; +117.835op/s] or [-14.419%; +8.066%]		 2.513ms 7.361ms 1414.500op/s 2.424ms 7.113ms 1460.906op/s
scenario:load:insecure-bank:iast_FULL:high_load worse
[+165.701µs; +306.093µs] or [+3.213%; +5.935%]		 unsure
[+157.033µs; +932.266µs] or [+1.261%; +7.488%]		 unstable
[-116.884op/s; +56.884op/s] or [-14.722%; +7.165%]		 5.393ms 12.995ms 763.969op/s 5.157ms 12.450ms 793.969op/s
scenario:load:petclinic:appsec:high_load worse
[+430.527µs; +1220.252µs] or [+2.320%; +6.577%]		 same
[-134.586µs; +1699.473µs] or [-0.445%; +5.620%]		 unstable
[-33.207op/s; +12.707op/s] or [-13.412%; +5.132%]		 19.379ms 31.020ms 237.344op/s 18.554ms 30.237ms 247.594op/s
Request duration reports for insecure-bank 
gantt
    title insecure-bank - request duration [CI 0.99] : candidate=1.60.0-SNAPSHOT~a149be6159, baseline=1.60.0-SNAPSHOT~be0482d740
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.187 ms) : 1175, 1198
.   : milestone, 1187,
iast (3.13 ms) : 3088, 3172
.   : milestone, 3130,
iast_FULL (5.825 ms) : 5766, 5883
.   : milestone, 5825,
iast_GLOBAL (3.479 ms) : 3421, 3536
.   : milestone, 3479,
profiling (2.115 ms) : 2096, 2133
.   : milestone, 2115,
tracing (1.782 ms) : 1768, 1796
.   : milestone, 1782,
section candidate
no_agent (1.189 ms) : 1178, 1200
.   : milestone, 1189,
iast (3.234 ms) : 3191, 3277
.   : milestone, 3234,
iast_FULL (6.055 ms) : 5993, 6116
.   : milestone, 6055,
iast_GLOBAL (3.581 ms) : 3519, 3642
.   : milestone, 3581,
profiling (2.091 ms) : 2072, 2110
.   : milestone, 2091,
tracing (1.778 ms) : 1764, 1793
.   : milestone, 1778,
Loading
  • baseline results
Variant Request duration [CI 0.99] Δ no_agent
no_agent 1.187 ms [1.175 ms, 1.198 ms] -
iast 3.13 ms [3.088 ms, 3.172 ms] 1.943 ms (163.8%)
iast_FULL 5.825 ms [5.766 ms, 5.883 ms] 4.638 ms (390.9%)
iast_GLOBAL 3.479 ms [3.421 ms, 3.536 ms] 2.292 ms (193.1%)
profiling 2.115 ms [2.096 ms, 2.133 ms] 928.079 µs (78.2%)
tracing 1.782 ms [1.768 ms, 1.796 ms] 595.576 µs (50.2%)
  • candidate results
Variant Request duration [CI 0.99] Δ no_agent
no_agent 1.189 ms [1.178 ms, 1.2 ms] -
iast 3.234 ms [3.191 ms, 3.277 ms] 2.045 ms (171.9%)
iast_FULL 6.055 ms [5.993 ms, 6.116 ms] 4.866 ms (409.1%)
iast_GLOBAL 3.581 ms [3.519 ms, 3.642 ms] 2.391 ms (201.1%)
profiling 2.091 ms [2.072 ms, 2.11 ms] 901.918 µs (75.8%)
tracing 1.778 ms [1.764 ms, 1.793 ms] 589.123 µs (49.5%)
Request duration reports for petclinic 
gantt
    title petclinic - request duration [CI 0.99] : candidate=1.60.0-SNAPSHOT~a149be6159, baseline=1.60.0-SNAPSHOT~be0482d740
    dateFormat X
    axisFormat %s
section baseline
no_agent (19.422 ms) : 19220, 19623
.   : milestone, 19422,
appsec (18.852 ms) : 18660, 19045
.   : milestone, 18852,
code_origins (17.574 ms) : 17400, 17749
.   : milestone, 17574,
iast (18.072 ms) : 17890, 18255
.   : milestone, 18072,
profiling (18.268 ms) : 18087, 18449
.   : milestone, 18268,
tracing (17.779 ms) : 17600, 17957
.   : milestone, 17779,
section candidate
no_agent (19.53 ms) : 19330, 19729
.   : milestone, 19530,
appsec (19.666 ms) : 19464, 19867
.   : milestone, 19666,
code_origins (17.393 ms) : 17223, 17563
.   : milestone, 17393,
iast (17.629 ms) : 17455, 17803
.   : milestone, 17629,
profiling (18.792 ms) : 18603, 18982
.   : milestone, 18792,
tracing (17.935 ms) : 17755, 18115
.   : milestone, 17935,
Loading
  • baseline results
Variant Request duration [CI 0.99] Δ no_agent
no_agent 19.422 ms [19.22 ms, 19.623 ms] -
appsec 18.852 ms [18.66 ms, 19.045 ms] -569.422 µs (-2.9%)
code_origins 17.574 ms [17.4 ms, 17.749 ms] -1.848 ms (-9.5%)
iast 18.072 ms [17.89 ms, 18.255 ms] -1.349 ms (-6.9%)
profiling 18.268 ms [18.087 ms, 18.449 ms] -1.154 ms (-5.9%)
tracing 17.779 ms [17.6 ms, 17.957 ms] -1.643 ms (-8.5%)
  • candidate results
Variant Request duration [CI 0.99] Δ no_agent
no_agent 19.53 ms [19.33 ms, 19.729 ms] -
appsec 19.666 ms [19.464 ms, 19.867 ms] 136.115 µs (0.7%)
code_origins 17.393 ms [17.223 ms, 17.563 ms] -2.137 ms (-10.9%)
iast 17.629 ms [17.455 ms, 17.803 ms] -1.901 ms (-9.7%)
profiling 18.792 ms [18.603 ms, 18.982 ms] -737.135 µs (-3.8%)
tracing 17.935 ms [17.755 ms, 18.115 ms] -1.595 ms (-8.2%)

Dacapo

Parameters

Baseline Candidate
baseline_or_candidate baseline candidate
git_branch master dougqh/strings-improvements
git_commit_date 1771938460 1772033530
git_commit_sha be0482d a149be6
release_version 1.60.0-SNAPSHOT~be0482d740 1.60.0-SNAPSHOT~a149be6159
See matching parameters
Baseline Candidate
application biojava biojava
ci_job_date 1772035484 1772035484
ci_job_id 1455626242 1455626242
ci_pipeline_id 98884345 98884345
cpu_model Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
kernel_version Linux runner-zfyrx7zua-project-304-concurrent-0-fbui2bo3 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux Linux runner-zfyrx7zua-project-304-concurrent-0-fbui2bo3 6.8.0-1031-aws #33~22.04.1-Ubuntu SMP Thu Jun 26 14:22:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Summary

Found 0 performance improvements and 0 performance regressions! Performance is the same for 11 metrics, 1 unstable metrics.

Execution time for tomcat 
gantt
    title tomcat - execution time [CI 0.99] : candidate=1.60.0-SNAPSHOT~a149be6159, baseline=1.60.0-SNAPSHOT~be0482d740
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.473 ms) : 1461, 1484
.   : milestone, 1473,
appsec (3.795 ms) : 3572, 4018
.   : milestone, 3795,
iast (2.256 ms) : 2186, 2325
.   : milestone, 2256,
iast_GLOBAL (2.3 ms) : 2230, 2369
.   : milestone, 2300,
profiling (2.112 ms) : 2055, 2169
.   : milestone, 2112,
tracing (2.053 ms) : 2000, 2107
.   : milestone, 2053,
section candidate
no_agent (1.467 ms) : 1456, 1479
.   : milestone, 1467,
appsec (3.76 ms) : 3540, 3980
.   : milestone, 3760,
iast (2.253 ms) : 2184, 2322
.   : milestone, 2253,
iast_GLOBAL (2.294 ms) : 2225, 2364
.   : milestone, 2294,
profiling (2.082 ms) : 2027, 2136
.   : milestone, 2082,
tracing (2.066 ms) : 2013, 2120
.   : milestone, 2066,
Loading
  • baseline results
Variant Execution Time [CI 0.99] Δ no_agent
no_agent 1.473 ms [1.461 ms, 1.484 ms] -
appsec 3.795 ms [3.572 ms, 4.018 ms] 2.322 ms (157.7%)
iast 2.256 ms [2.186 ms, 2.325 ms] 782.928 µs (53.2%)
iast_GLOBAL 2.3 ms [2.23 ms, 2.369 ms] 827.242 µs (56.2%)
profiling 2.112 ms [2.055 ms, 2.169 ms] 638.957 µs (43.4%)
tracing 2.053 ms [2.0 ms, 2.107 ms] 580.611 µs (39.4%)
  • candidate results
Variant Execution Time [CI 0.99] Δ no_agent
no_agent 1.467 ms [1.456 ms, 1.479 ms] -
appsec 3.76 ms [3.54 ms, 3.98 ms] 2.292 ms (156.2%)
iast 2.253 ms [2.184 ms, 2.322 ms] 785.467 µs (53.5%)
iast_GLOBAL 2.294 ms [2.225 ms, 2.364 ms] 826.75 µs (56.3%)
profiling 2.082 ms [2.027 ms, 2.136 ms] 614.196 µs (41.9%)
tracing 2.066 ms [2.013 ms, 2.12 ms] 598.95 µs (40.8%)
Execution time for biojava 
gantt
    title biojava - execution time [CI 0.99] : candidate=1.60.0-SNAPSHOT~a149be6159, baseline=1.60.0-SNAPSHOT~be0482d740
    dateFormat X
    axisFormat %s
section baseline
no_agent (15.143 s) : 15143000, 15143000
.   : milestone, 15143000,
appsec (14.702 s) : 14702000, 14702000
.   : milestone, 14702000,
iast (18.645 s) : 18645000, 18645000
.   : milestone, 18645000,
iast_GLOBAL (17.939 s) : 17939000, 17939000
.   : milestone, 17939000,
profiling (15.14 s) : 15140000, 15140000
.   : milestone, 15140000,
tracing (14.823 s) : 14823000, 14823000
.   : milestone, 14823000,
section candidate
no_agent (15.734 s) : 15734000, 15734000
.   : milestone, 15734000,
appsec (14.99 s) : 14990000, 14990000
.   : milestone, 14990000,
iast (18.119 s) : 18119000, 18119000
.   : milestone, 18119000,
iast_GLOBAL (17.681 s) : 17681000, 17681000
.   : milestone, 17681000,
profiling (15.24 s) : 15240000, 15240000
.   : milestone, 15240000,
tracing (14.684 s) : 14684000, 14684000
.   : milestone, 14684000,
Loading
  • baseline results
Variant Execution Time [CI 0.99] Δ no_agent
no_agent 15.143 s [15.143 s, 15.143 s] -
appsec 14.702 s [14.702 s, 14.702 s] -441.0 ms (-2.9%)
iast 18.645 s [18.645 s, 18.645 s] 3.502 s (23.1%)
iast_GLOBAL 17.939 s [17.939 s, 17.939 s] 2.796 s (18.5%)
profiling 15.14 s [15.14 s, 15.14 s] -3.0 ms (-0.0%)
tracing 14.823 s [14.823 s, 14.823 s] -320.0 ms (-2.1%)
  • candidate results
Variant Execution Time [CI 0.99] Δ no_agent
no_agent 15.734 s [15.734 s, 15.734 s] -
appsec 14.99 s [14.99 s, 14.99 s] -744.0 ms (-4.7%)
iast 18.119 s [18.119 s, 18.119 s] 2.385 s (15.2%)
iast_GLOBAL 17.681 s [17.681 s, 17.681 s] 1.947 s (12.4%)
profiling 15.24 s [15.24 s, 15.24 s] -494.0 ms (-3.1%)
tracing 14.684 s [14.684 s, 14.684 s] -1.05 s (-6.7%)

jbachorik
jbachorik reviewed Feb 23, 2026
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internal-api/src/jmh/java/datadog/trace/util/StringReplacementBenchmark.java Outdated
Comment on lines 23 to 25
* StringReplacementBenchmark.string_replaceAll thrpt 6 14611046.391 ± 4865682.875 ops/s
* StringReplacementBenchmark.string_replaceAll:gc.alloc.rate thrpt 6 11391.346 ± 3790.917 MB/sec
*
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@jbachorik jbachorik Feb 23, 2026

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Can you add also String.replace(CharSequence, CharSequence) for completeness?

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@dougqh dougqh Feb 24, 2026

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Good catch. I'd overlooked that replace actually does a replace all, so I didn't realize it was equivalent.

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@dougqh dougqh Feb 24, 2026

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To my surprise, the Strings.replaceAll that implemented is actually still 20% faster than String.replace.

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