Fix ISO 8601 date parsing to support variable precision #10419

leoromanovsky · 2026-01-22T00:36:27Z

Motivation

The DateAdapter was using a DateTimeFormatter with a fixed [.SSS] pattern, which only supports optional 3-digit milliseconds. This caused dates with 6-digit microsecond precision (e.g., "2025-09-23T15:48:37.235982Z") sent by the backend to silently fail parsing (returning null).

Associated system test: DataDog/system-tests#6087

What Does This Do

Changed to use Instant.parse() which correctly handles all valid ISO 8601 date formats including:

No fractional seconds: 2020-01-01T00:00:00Z
1-9 digit fractional seconds (beyond ms precision truncated by Date)
UTC offsets: 2023-01-01T01:00:00+01:00

Added comprehensive unit tests for various date precisions and updated smoke test data with microsecond-date-test flag and test cases.

Additional Notes

Contributor Checklist

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Jira ticket: [PROJ-IDENT]

pr-commenter · 2026-01-22T01:25:01Z

Benchmarks

Startup

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	leo/fix-iso8601-date-parsing
git_commit_date	1769039825	1769046472
git_commit_sha	`637f9ce`	`b9aca43`
release_version	1.59.0-SNAPSHOT~637f9ce1d3	1.59.0-SNAPSHOT~b9aca431bb

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1769048412	1769048412
ci_job_id	1367677301	1367677301
ci_pipeline_id	92078775	92078775
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-1-ivx47606 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-1-ivx47606 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 57 metrics, 8 unstable metrics.

Startup time reports for insecure-bank

gantt
    title insecure-bank - global startup overhead: candidate=1.59.0-SNAPSHOT~b9aca431bb, baseline=1.59.0-SNAPSHOT~637f9ce1d3

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.089 s) : 0, 1089483
Total [baseline] (8.782 s) : 0, 8782239
Agent [candidate] (1.084 s) : 0, 1084167
Total [candidate] (8.748 s) : 0, 8747611
section iast
Agent [baseline] (1.23 s) : 0, 1229959
Total [baseline] (9.344 s) : 0, 9344319
Agent [candidate] (1.222 s) : 0, 1222175
Total [candidate] (9.319 s) : 0, 9319317

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.089 s	-
Agent	iast	1.23 s	140.476 ms (12.9%)
Total	tracing	8.782 s	-
Total	iast	9.344 s	562.08 ms (6.4%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.084 s	-
Agent	iast	1.222 s	138.007 ms (12.7%)
Total	tracing	8.748 s	-
Total	iast	9.319 s	571.706 ms (6.5%)

gantt
    title insecure-bank - break down per module: candidate=1.59.0-SNAPSHOT~b9aca431bb, baseline=1.59.0-SNAPSHOT~637f9ce1d3

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.198 ms) : 0, 1198
crashtracking [candidate] (1.183 ms) : 0, 1183
BytebuddyAgent [baseline] (655.464 ms) : 0, 655464
BytebuddyAgent [candidate] (651.445 ms) : 0, 651445
GlobalTracer [baseline] (283.753 ms) : 0, 283753
GlobalTracer [candidate] (283.083 ms) : 0, 283083
AppSec [baseline] (32.767 ms) : 0, 32767
AppSec [candidate] (32.547 ms) : 0, 32547
Debugger [baseline] (67.187 ms) : 0, 67187
Debugger [candidate] (67.015 ms) : 0, 67015
Remote Config [baseline] (705.898 µs) : 0, 706
Remote Config [candidate] (637.654 µs) : 0, 638
Telemetry [baseline] (8.974 ms) : 0, 8974
Telemetry [candidate] (8.908 ms) : 0, 8908
Flare Poller [baseline] (3.879 ms) : 0, 3879
Flare Poller [candidate] (3.798 ms) : 0, 3798
section iast
crashtracking [baseline] (1.188 ms) : 0, 1188
crashtracking [candidate] (1.193 ms) : 0, 1193
BytebuddyAgent [baseline] (797.523 ms) : 0, 797523
BytebuddyAgent [candidate] (791.734 ms) : 0, 791734
GlobalTracer [baseline] (257.121 ms) : 0, 257121
GlobalTracer [candidate] (256.014 ms) : 0, 256014
AppSec [baseline] (32.828 ms) : 0, 32828
AppSec [candidate] (34.365 ms) : 0, 34365
Debugger [baseline] (66.176 ms) : 0, 66176
Debugger [candidate] (64.299 ms) : 0, 64299
Remote Config [baseline] (599.621 µs) : 0, 600
Remote Config [candidate] (588.644 µs) : 0, 589
Telemetry [baseline] (8.401 ms) : 0, 8401
Telemetry [candidate] (8.389 ms) : 0, 8389
Flare Poller [baseline] (3.558 ms) : 0, 3558
Flare Poller [candidate] (3.561 ms) : 0, 3561
IAST [baseline] (27.062 ms) : 0, 27062
IAST [candidate] (26.749 ms) : 0, 26749

Startup time reports for petclinic

gantt
    title petclinic - global startup overhead: candidate=1.59.0-SNAPSHOT~b9aca431bb, baseline=1.59.0-SNAPSHOT~637f9ce1d3

    dateFormat X
    axisFormat %s
section tracing
Agent [baseline] (1.088 s) : 0, 1087959
Total [baseline] (11.017 s) : 0, 11017108
Agent [candidate] (1.085 s) : 0, 1084654
Total [candidate] (10.761 s) : 0, 10761484
section appsec
Agent [baseline] (1.265 s) : 0, 1265335
Total [baseline] (11.061 s) : 0, 11060561
Agent [candidate] (1.267 s) : 0, 1267053
Total [candidate] (11.009 s) : 0, 11008673
section iast
Agent [baseline] (1.23 s) : 0, 1230030
Total [baseline] (11.167 s) : 0, 11166613
Agent [candidate] (1.233 s) : 0, 1233164
Total [candidate] (11.202 s) : 0, 11202028
section profiling
Agent [baseline] (1.208 s) : 0, 1207537
Total [baseline] (10.896 s) : 0, 10896170
Agent [candidate] (1.206 s) : 0, 1205874
Total [candidate] (10.983 s) : 0, 10983426

baseline results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.088 s	-
Agent	appsec	1.265 s	177.375 ms (16.3%)
Agent	iast	1.23 s	142.07 ms (13.1%)
Agent	profiling	1.208 s	119.578 ms (11.0%)
Total	tracing	11.017 s	-
Total	appsec	11.061 s	43.453 ms (0.4%)
Total	iast	11.167 s	149.505 ms (1.4%)
Total	profiling	10.896 s	-120.938 ms (-1.1%)

candidate results

Module	Variant	Duration	Δ tracing
Agent	tracing	1.085 s	-
Agent	appsec	1.267 s	182.399 ms (16.8%)
Agent	iast	1.233 s	148.51 ms (13.7%)
Agent	profiling	1.206 s	121.22 ms (11.2%)
Total	tracing	10.761 s	-
Total	appsec	11.009 s	247.189 ms (2.3%)
Total	iast	11.202 s	440.544 ms (4.1%)
Total	profiling	10.983 s	221.942 ms (2.1%)

gantt
    title petclinic - break down per module: candidate=1.59.0-SNAPSHOT~b9aca431bb, baseline=1.59.0-SNAPSHOT~637f9ce1d3

    dateFormat X
    axisFormat %s
section tracing
crashtracking [baseline] (1.175 ms) : 0, 1175
crashtracking [candidate] (1.175 ms) : 0, 1175
BytebuddyAgent [baseline] (652.945 ms) : 0, 652945
BytebuddyAgent [candidate] (651.965 ms) : 0, 651965
GlobalTracer [baseline] (283.492 ms) : 0, 283492
GlobalTracer [candidate] (282.721 ms) : 0, 282721
AppSec [baseline] (32.857 ms) : 0, 32857
AppSec [candidate] (32.555 ms) : 0, 32555
Debugger [baseline] (68.542 ms) : 0, 68542
Debugger [candidate] (66.733 ms) : 0, 66733
Remote Config [baseline] (639.778 µs) : 0, 640
Remote Config [candidate] (639.823 µs) : 0, 640
Telemetry [baseline] (9.021 ms) : 0, 9021
Telemetry [candidate] (8.962 ms) : 0, 8962
Flare Poller [baseline] (3.83 ms) : 0, 3830
Flare Poller [candidate] (4.5 ms) : 0, 4500
section appsec
crashtracking [baseline] (1.176 ms) : 0, 1176
crashtracking [candidate] (1.193 ms) : 0, 1193
BytebuddyAgent [baseline] (690.921 ms) : 0, 690921
BytebuddyAgent [candidate] (692.909 ms) : 0, 692909
GlobalTracer [baseline] (258.961 ms) : 0, 258961
GlobalTracer [candidate] (259.355 ms) : 0, 259355
IAST [baseline] (24.595 ms) : 0, 24595
IAST [candidate] (24.562 ms) : 0, 24562
AppSec [baseline] (172.975 ms) : 0, 172975
AppSec [candidate] (173.163 ms) : 0, 173163
Debugger [baseline] (67.492 ms) : 0, 67492
Debugger [candidate] (66.686 ms) : 0, 66686
Remote Config [baseline] (791.453 µs) : 0, 791
Remote Config [candidate] (783.403 µs) : 0, 783
Telemetry [baseline] (9.305 ms) : 0, 9305
Telemetry [candidate] (9.192 ms) : 0, 9192
Flare Poller [baseline] (3.667 ms) : 0, 3667
Flare Poller [candidate] (3.739 ms) : 0, 3739
section iast
crashtracking [baseline] (1.178 ms) : 0, 1178
crashtracking [candidate] (1.189 ms) : 0, 1189
BytebuddyAgent [baseline] (796.761 ms) : 0, 796761
BytebuddyAgent [candidate] (798.803 ms) : 0, 798803
GlobalTracer [baseline] (256.951 ms) : 0, 256951
GlobalTracer [candidate] (257.569 ms) : 0, 257569
IAST [baseline] (27.135 ms) : 0, 27135
IAST [candidate] (27.215 ms) : 0, 27215
AppSec [baseline] (33.649 ms) : 0, 33649
AppSec [candidate] (34.592 ms) : 0, 34592
Debugger [baseline] (66.47 ms) : 0, 66470
Debugger [candidate] (65.726 ms) : 0, 65726
Remote Config [baseline] (572.798 µs) : 0, 573
Remote Config [candidate] (565.326 µs) : 0, 565
Telemetry [baseline] (8.372 ms) : 0, 8372
Telemetry [candidate] (8.455 ms) : 0, 8455
Flare Poller [baseline] (3.562 ms) : 0, 3562
Flare Poller [candidate] (3.615 ms) : 0, 3615
section profiling
crashtracking [baseline] (1.227 ms) : 0, 1227
crashtracking [candidate] (1.224 ms) : 0, 1224
BytebuddyAgent [baseline] (703.531 ms) : 0, 703531
BytebuddyAgent [candidate] (702.198 ms) : 0, 702198
GlobalTracer [baseline] (221.456 ms) : 0, 221456
GlobalTracer [candidate] (221.153 ms) : 0, 221153
AppSec [baseline] (32.385 ms) : 0, 32385
AppSec [candidate] (32.195 ms) : 0, 32195
Debugger [baseline] (68.268 ms) : 0, 68268
Debugger [candidate] (68.095 ms) : 0, 68095
Remote Config [baseline] (627.837 µs) : 0, 628
Remote Config [candidate] (637.397 µs) : 0, 637
Telemetry [baseline] (8.841 ms) : 0, 8841
Telemetry [candidate] (8.959 ms) : 0, 8959
Flare Poller [baseline] (3.735 ms) : 0, 3735
Flare Poller [candidate] (3.808 ms) : 0, 3808
ProfilingAgent [baseline] (97.691 ms) : 0, 97691
ProfilingAgent [candidate] (97.64 ms) : 0, 97640
Profiling [baseline] (98.275 ms) : 0, 98275
Profiling [candidate] (98.216 ms) : 0, 98216

Load

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	leo/fix-iso8601-date-parsing
git_commit_date	1769039825	1769046472
git_commit_sha	`637f9ce`	`b9aca43`
release_version	1.59.0-SNAPSHOT~637f9ce1d3	1.59.0-SNAPSHOT~b9aca431bb

See matching parameters

	Baseline	Candidate
application	insecure-bank	insecure-bank
ci_job_date	1769048906	1769048906
ci_job_id	1367677302	1367677302
ci_pipeline_id	92078775	92078775
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-2-s1b839gp 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-2-s1b839gp 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 1 performance improvements and 2 performance regressions! Performance is the same for 16 metrics, 17 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_FULL:high_load	worse [+349.266µs; +585.445µs] or [+7.140%; +11.968%]	worse [+505.709µs; +1137.663µs] or [+4.251%; +9.563%]	unstable [-140.913op/s; +16.225op/s] or [-16.913%; +1.947%]	5.359ms	12.719ms	770.812op/s	4.892ms	11.897ms	833.156op/s
scenario:load:insecure-bank:iast_GLOBAL:high_load	better [-197.668µs; -86.439µs] or [-6.875%; -3.007%]	unstable [-1430.763µs; +139.126µs] or [-17.077%; +1.661%]	unstable [-79.148op/s; +194.460op/s] or [-6.279%; +15.426%]	2.733ms	7.733ms	1318.219op/s	2.875ms	8.378ms	1260.562op/s

Request duration reports for petclinic

gantt
    title petclinic - request duration [CI 0.99] : candidate=1.59.0-SNAPSHOT~b9aca431bb, baseline=1.59.0-SNAPSHOT~637f9ce1d3
    dateFormat X
    axisFormat %s
section baseline
no_agent (19.363 ms) : 19163, 19563
.   : milestone, 19363,
appsec (18.951 ms) : 18757, 19144
.   : milestone, 18951,
code_origins (17.78 ms) : 17604, 17957
.   : milestone, 17780,
iast (18.135 ms) : 17954, 18317
.   : milestone, 18135,
profiling (18.998 ms) : 18808, 19189
.   : milestone, 18998,
tracing (17.647 ms) : 17468, 17826
.   : milestone, 17647,
section candidate
no_agent (19.213 ms) : 19015, 19412
.   : milestone, 19213,
appsec (18.839 ms) : 18652, 19026
.   : milestone, 18839,
code_origins (18.084 ms) : 17902, 18265
.   : milestone, 18084,
iast (18.819 ms) : 18631, 19007
.   : milestone, 18819,
profiling (18.978 ms) : 18786, 19170
.   : milestone, 18978,
tracing (17.813 ms) : 17635, 17992
.   : milestone, 17813,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	19.363 ms [19.163 ms, 19.563 ms]	-
appsec	18.951 ms [18.757 ms, 19.144 ms]	-412.594 µs (-2.1%)
code_origins	17.78 ms [17.604 ms, 17.957 ms]	-1.583 ms (-8.2%)
iast	18.135 ms [17.954 ms, 18.317 ms]	-1.228 ms (-6.3%)
profiling	18.998 ms [18.808 ms, 19.189 ms]	-364.965 µs (-1.9%)
tracing	17.647 ms [17.468 ms, 17.826 ms]	-1.716 ms (-8.9%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	19.213 ms [19.015 ms, 19.412 ms]	-
appsec	18.839 ms [18.652 ms, 19.026 ms]	-374.04 µs (-1.9%)
code_origins	18.084 ms [17.902 ms, 18.265 ms]	-1.13 ms (-5.9%)
iast	18.819 ms [18.631 ms, 19.007 ms]	-394.022 µs (-2.1%)
profiling	18.978 ms [18.786 ms, 19.17 ms]	-234.844 µs (-1.2%)
tracing	17.813 ms [17.635 ms, 17.992 ms]	-1.4 ms (-7.3%)

Request duration reports for insecure-bank

gantt
    title insecure-bank - request duration [CI 0.99] : candidate=1.59.0-SNAPSHOT~b9aca431bb, baseline=1.59.0-SNAPSHOT~637f9ce1d3
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.175 ms) : 1163, 1186
.   : milestone, 1175,
iast (3.178 ms) : 3136, 3220
.   : milestone, 3178,
iast_FULL (5.545 ms) : 5490, 5600
.   : milestone, 5545,
iast_GLOBAL (3.638 ms) : 3578, 3698
.   : milestone, 3638,
profiling (2.086 ms) : 2068, 2104
.   : milestone, 2086,
tracing (1.791 ms) : 1776, 1805
.   : milestone, 1791,
section candidate
no_agent (1.172 ms) : 1160, 1183
.   : milestone, 1172,
iast (3.266 ms) : 3222, 3309
.   : milestone, 3266,
iast_FULL (5.999 ms) : 5939, 6060
.   : milestone, 5999,
iast_GLOBAL (3.476 ms) : 3424, 3528
.   : milestone, 3476,
profiling (1.949 ms) : 1933, 1965
.   : milestone, 1949,
tracing (1.879 ms) : 1861, 1897
.   : milestone, 1879,

baseline results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.175 ms [1.163 ms, 1.186 ms]	-
iast	3.178 ms [3.136 ms, 3.22 ms]	2.003 ms (170.5%)
iast_FULL	5.545 ms [5.49 ms, 5.6 ms]	4.37 ms (372.0%)
iast_GLOBAL	3.638 ms [3.578 ms, 3.698 ms]	2.464 ms (209.7%)
profiling	2.086 ms [2.068 ms, 2.104 ms]	911.269 µs (77.6%)
tracing	1.791 ms [1.776 ms, 1.805 ms]	615.926 µs (52.4%)

candidate results

Variant	Request duration [CI 0.99]	Δ no_agent
no_agent	1.172 ms [1.16 ms, 1.183 ms]	-
iast	3.266 ms [3.222 ms, 3.309 ms]	2.094 ms (178.7%)
iast_FULL	5.999 ms [5.939 ms, 6.06 ms]	4.828 ms (412.1%)
iast_GLOBAL	3.476 ms [3.424 ms, 3.528 ms]	2.304 ms (196.7%)
profiling	1.949 ms [1.933 ms, 1.965 ms]	777.051 µs (66.3%)
tracing	1.879 ms [1.861 ms, 1.897 ms]	707.284 µs (60.4%)

Dacapo

Parameters

	Baseline	Candidate
baseline_or_candidate	baseline	candidate
git_branch	master	leo/fix-iso8601-date-parsing
git_commit_date	1769039825	1769046472
git_commit_sha	`637f9ce`	`b9aca43`
release_version	1.59.0-SNAPSHOT~637f9ce1d3	1.59.0-SNAPSHOT~b9aca431bb

See matching parameters

	Baseline	Candidate
application	biojava	biojava
ci_job_date	1769048561	1769048561
ci_job_id	1367677303	1367677303
ci_pipeline_id	92078775	92078775
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-hyj241nk 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-hyj241nk 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 biojava

gantt
    title biojava - execution time [CI 0.99] : candidate=1.59.0-SNAPSHOT~b9aca431bb, baseline=1.59.0-SNAPSHOT~637f9ce1d3
    dateFormat X
    axisFormat %s
section baseline
no_agent (14.828 s) : 14828000, 14828000
.   : milestone, 14828000,
appsec (15.033 s) : 15033000, 15033000
.   : milestone, 15033000,
iast (18.114 s) : 18114000, 18114000
.   : milestone, 18114000,
iast_GLOBAL (17.981 s) : 17981000, 17981000
.   : milestone, 17981000,
profiling (14.953 s) : 14953000, 14953000
.   : milestone, 14953000,
tracing (14.71 s) : 14710000, 14710000
.   : milestone, 14710000,
section candidate
no_agent (14.725 s) : 14725000, 14725000
.   : milestone, 14725000,
appsec (14.798 s) : 14798000, 14798000
.   : milestone, 14798000,
iast (17.966 s) : 17966000, 17966000
.   : milestone, 17966000,
iast_GLOBAL (17.653 s) : 17653000, 17653000
.   : milestone, 17653000,
profiling (15.467 s) : 15467000, 15467000
.   : milestone, 15467000,
tracing (14.655 s) : 14655000, 14655000
.   : milestone, 14655000,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	14.828 s [14.828 s, 14.828 s]	-
appsec	15.033 s [15.033 s, 15.033 s]	205.0 ms (1.4%)
iast	18.114 s [18.114 s, 18.114 s]	3.286 s (22.2%)
iast_GLOBAL	17.981 s [17.981 s, 17.981 s]	3.153 s (21.3%)
profiling	14.953 s [14.953 s, 14.953 s]	125.0 ms (0.8%)
tracing	14.71 s [14.71 s, 14.71 s]	-118.0 ms (-0.8%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	14.725 s [14.725 s, 14.725 s]	-
appsec	14.798 s [14.798 s, 14.798 s]	73.0 ms (0.5%)
iast	17.966 s [17.966 s, 17.966 s]	3.241 s (22.0%)
iast_GLOBAL	17.653 s [17.653 s, 17.653 s]	2.928 s (19.9%)
profiling	15.467 s [15.467 s, 15.467 s]	742.0 ms (5.0%)
tracing	14.655 s [14.655 s, 14.655 s]	-70.0 ms (-0.5%)

Execution time for tomcat

gantt
    title tomcat - execution time [CI 0.99] : candidate=1.59.0-SNAPSHOT~b9aca431bb, baseline=1.59.0-SNAPSHOT~637f9ce1d3
    dateFormat X
    axisFormat %s
section baseline
no_agent (1.472 ms) : 1460, 1483
.   : milestone, 1472,
appsec (3.737 ms) : 3518, 3956
.   : milestone, 3737,
iast (2.221 ms) : 2156, 2287
.   : milestone, 2221,
iast_GLOBAL (2.267 ms) : 2201, 2333
.   : milestone, 2267,
profiling (2.062 ms) : 2009, 2115
.   : milestone, 2062,
tracing (2.055 ms) : 2003, 2107
.   : milestone, 2055,
section candidate
no_agent (1.475 ms) : 1463, 1486
.   : milestone, 1475,
appsec (3.745 ms) : 3524, 3967
.   : milestone, 3745,
iast (2.213 ms) : 2148, 2279
.   : milestone, 2213,
iast_GLOBAL (2.267 ms) : 2201, 2333
.   : milestone, 2267,
profiling (2.092 ms) : 2037, 2147
.   : milestone, 2092,
tracing (2.059 ms) : 2007, 2111
.   : milestone, 2059,

baseline results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.472 ms [1.46 ms, 1.483 ms]	-
appsec	3.737 ms [3.518 ms, 3.956 ms]	2.266 ms (154.0%)
iast	2.221 ms [2.156 ms, 2.287 ms]	749.85 µs (51.0%)
iast_GLOBAL	2.267 ms [2.201 ms, 2.333 ms]	795.48 µs (54.1%)
profiling	2.062 ms [2.009 ms, 2.115 ms]	590.575 µs (40.1%)
tracing	2.055 ms [2.003 ms, 2.107 ms]	583.678 µs (39.7%)

candidate results

Variant	Execution Time [CI 0.99]	Δ no_agent
no_agent	1.475 ms [1.463 ms, 1.486 ms]	-
appsec	3.745 ms [3.524 ms, 3.967 ms]	2.271 ms (154.0%)
iast	2.213 ms [2.148 ms, 2.279 ms]	738.655 µs (50.1%)
iast_GLOBAL	2.267 ms [2.201 ms, 2.333 ms]	792.448 µs (53.7%)
profiling	2.092 ms [2.037 ms, 2.147 ms]	617.252 µs (41.9%)
tracing	2.059 ms [2.007 ms, 2.111 ms]	584.029 µs (39.6%)

The DateAdapter was using a DateTimeFormatter with a fixed [.SSS] pattern, which only supports optional 3-digit milliseconds. This caused dates with 6-digit microsecond precision (e.g., "2025-09-23T15:48:37.235982Z") sent by the backend to silently fail parsing (returning null). Changed to use Instant.parse() which correctly handles all valid ISO 8601 date formats including: - No fractional seconds: 2020-01-01T00:00:00Z - 1-9 digit fractional seconds (beyond ms precision truncated by Date) - UTC offsets: 2023-01-01T01:00:00+01:00 Added comprehensive unit tests for various date precisions and updated smoke test data with microsecond-date-test flag and test cases.

github-actions · 2026-01-22T03:31:31Z

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typotter

nice fix, great docs and tests.

typotter · 2026-01-23T16:12:20Z

...ucts/feature-flagging/lib/src/main/java/com/datadog/featureflag/RemoteConfigServiceImpl.java

-        final Instant instant = Instant.from(temporalAccessor);
-        return Date.from(instant);
+        // Use OffsetDateTime which handles variable precision fractional seconds (0-9 digits)
+        // and UTC offsets (+01:00, -05:00, Z)


leoromanovsky force-pushed the leo/fix-iso8601-date-parsing branch 2 times, most recently from f2f0ae8 to 6261288 Compare January 22, 2026 01:47

leoromanovsky force-pushed the leo/fix-iso8601-date-parsing branch from 6261288 to b9aca43 Compare January 22, 2026 01:47

leoromanovsky marked this pull request as ready for review January 22, 2026 03:31

leoromanovsky requested a review from a team as a code owner January 22, 2026 03:31

leoromanovsky assigned typotter and dd-oleksii Jan 22, 2026

leoromanovsky added the comp: openfeature OpenFeature label Jan 22, 2026

leoromanovsky changed the title ~~[Feature Flags] Fix ISO 8601 date parsing to support variable precision~~ Fix ISO 8601 date parsing to support variable precision Jan 22, 2026

leoromanovsky added the type: bug Bug report and fix label Jan 22, 2026

typotter approved these changes Jan 23, 2026

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typotter assigned leoromanovsky and unassigned typotter Jan 23, 2026

leoromanovsky merged commit 7022f9b into master Jan 23, 2026
744 of 750 checks passed

leoromanovsky deleted the leo/fix-iso8601-date-parsing branch January 23, 2026 23:05

github-actions bot added this to the 1.59.0 milestone Jan 23, 2026

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Fix ISO 8601 date parsing to support variable precision #10419

Fix ISO 8601 date parsing to support variable precision #10419

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Fix ISO 8601 date parsing to support variable precision #10419

Fix ISO 8601 date parsing to support variable precision #10419

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