Add corner case test for switch_on_next

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Merging #176 (2acf097) into main (a57e1cb) will not change coverage.
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##             main     #176   +/-   ##
=======================================
  Coverage   99.67%   99.67%           
=======================================
  Files          68       68           
  Lines         921      921           
=======================================
  Hits          918      918           
  Misses          3        3           

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Linux CLANG

Observable construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable construction	0.41ns	0.402038	1.01	0.40ns
Dynamic observable construction	34.24ns	31.4382	1.09	30.39ns
Specific observable construction + as_dynamic	34.46ns	31.4539	1.10	30.09ns

Observable lift

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable lift specific observer	85.19ns	78.1305	1.09	350.04ns
Specific observable lift dynamic observer	114.01ns	105.815	1.08	368.85ns
Dynamic observable lift specific observer	186.46ns	161.527	1.15	409.12ns
Dynamic observable lift dynamic observer	196.88ns	182.702	1.08	389.84ns

Observable subscribe

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable subscribe specific observer	52.63ns	49.1444	1.07	366.60ns
Specific observable subscribe dynamic observer	71.25ns	61.2972	1.16	357.04ns
Dynamic observable subscribe specific observer	134.44ns	112.691	1.19	399.78ns
Dynamic observable subscribe dynamic observer	130.42ns	114.341	1.14	389.54ns

Observable subscribe #2

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable subscribe lambda	53.64ns	50.3809	1.06	354.69ns
Dynamic observable subscribe lambda	132.80ns	111.509	1.19	396.82ns
Specific observable subscribe lambda without subscription	53.67ns	49.2304	1.09	355.59ns
Dynamic observable subscribe lambda without subscription	133.36ns	111.19	1.20	397.30ns
Specific observable subscribe specific subscriber	20.16ns	16.0782	1.25	281.13ns
Dynamic observable subscribe specific subscriber	93.65ns	77.7714	1.20	328.04ns
Specific observable subscribe dynamic observer	20.19ns	16.0894	1.25	292.63ns
Dynamic observable subscribe dynamic observer	76.39ns	67.8936	1.13	311.76ns

Observer construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observer construction	0.81ns	0.401681	2.01	0.40ns
Dynamic observer construction	34.26ns	31.4392	1.09	25.94ns
Specific observer construction + as_dynamic	34.59ns	31.3292	1.10	26.07ns

OnNext

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observer OnNext	0.81ns	0.803336	1.00	0.81ns
Dynamic observer OnNext	2.01ns	1.6046	1.26	2.82ns

Operators

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
map construction from observable via dot + subscribe	85.78ns	75.5825	1.13	298.26ns

Subscriber construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Make subsriber	39.20ns	32.5905	1.20	79.72ns
Make copy of subscriber	20.20ns	18.8948	1.07	5.68ns
Transform subsriber to dynamic	52.69ns	47.262	1.11	31.78ns

Subscription

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
composite_subscription create	39.07ns	33.5782	1.16	62.90ns
composite_subscription add	56.83ns	46.8016	1.21	24.96ns
composite_subscription unsubscribe	7.25ns	8.04694	0.90	11.77ns

foundamental sources

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
empty	20.25ns	16.0674	1.26	42.44ns
error	59.33ns	48.3398	1.23	93.77ns
never	20.13ns	16.0837	1.25	285.45ns

from

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
from vector with int	32.28ns	24.9962	1.29	71.08ns

just

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
just send int	20.19ns	16.1237	1.25	44.20ns
just send variadic	20.18ns	18.9377	1.07	51.10ns

merge

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
merge	20.69ns	16.5803	1.25	150.36ns
merge_with	92.42ns	76.0841	1.21	353.79ns

publish_subject callbacks

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
on_next	29.46ns	31.1572	0.95	12.27ns
on_error	2.93ns	2.01786	1.45	23.08ns
on_completed	2.10ns	1.66648	1.26	0.83ns

publish_subject routines

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
construct	210.80ns	170.884	1.23	217.97ns
get_observable	31.72ns	33.706	0.94	60.80ns
get_subscriber	71.75ns	67.5445	1.06	16.94ns

Linux GCC

Observable construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable construction	0.40ns	0.335491	1.20	0.40ns
Dynamic observable construction	24.07ns	19.9007	1.21	28.27ns
Specific observable construction + as_dynamic	22.16ns	18.6629	1.19	27.69ns

Observable lift

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable lift specific observer	31.82ns	26.98	1.18	431.86ns
Specific observable lift dynamic observer	36.89ns	30.8454	1.20	449.12ns
Dynamic observable lift specific observer	89.86ns	74.4443	1.21	498.81ns
Dynamic observable lift dynamic observer	81.58ns	68.6907	1.19	474.46ns

Observable subscribe

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable subscribe specific observer	26.56ns	22.7495	1.17	424.15ns
Specific observable subscribe dynamic observer	28.11ns	23.6342	1.19	425.52ns
Dynamic observable subscribe specific observer	68.94ns	57.3317	1.20	481.56ns
Dynamic observable subscribe dynamic observer	49.60ns	39.6735	1.25	457.32ns

Observable subscribe #2

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable subscribe lambda	26.61ns	22.219	1.20	400.84ns
Dynamic observable subscribe lambda	70.25ns	58.001	1.21	510.03ns
Specific observable subscribe lambda without subscription	26.49ns	21.8471	1.21	401.62ns
Dynamic observable subscribe lambda without subscription	69.32ns	57.1499	1.21	489.59ns
Specific observable subscribe specific subscriber	4.50ns	3.75365	1.20	337.34ns
Dynamic observable subscribe specific subscriber	36.26ns	30.3069	1.20	391.56ns
Specific observable subscribe dynamic observer	4.59ns	3.72869	1.23	357.00ns
Dynamic observable subscribe dynamic observer	18.58ns	15.434	1.20	384.37ns

Observer construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observer construction	0.40ns	0.334565	1.20	0.40ns
Dynamic observer construction	23.40ns	19.7859	1.18	24.94ns
Specific observer construction + as_dynamic	23.18ns	19.1068	1.21	25.24ns

OnNext

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observer OnNext	0.40ns	0.335061	1.20	0.40ns
Dynamic observer OnNext	2.41ns	2.0102	1.20	2.09ns

Operators

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
map construction from observable via dot + subscribe	17.83ns	14.8348	1.20	417.43ns

Subscriber construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Make subsriber	26.36ns	21.9271	1.20	69.41ns
Make copy of subscriber	4.47ns	3.72615	1.20	5.41ns
Transform subsriber to dynamic	26.94ns	22.4686	1.20	35.08ns

Subscription

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
composite_subscription create	25.27ns	21.1165	1.20	65.17ns
composite_subscription add	26.03ns	22.0821	1.18	20.81ns
composite_subscription unsubscribe	8.24ns	6.91867	1.19	12.04ns

foundamental sources

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
empty	4.18ns	3.49151	1.20	56.32ns
error	43.01ns	35.8393	1.20	99.10ns
never	4.29ns	3.57941	1.20	340.20ns

from

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
from vector with int	26.94ns	22.5186	1.20	83.89ns

just

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
just send int	4.37ns	3.62977	1.20	61.27ns
just send variadic	4.92ns	4.12089	1.19	56.51ns

merge

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
merge	4.76ns	3.88915	1.22	176.70ns
merge_with	53.30ns	44.3539	1.20	430.90ns

publish_subject callbacks

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
on_next	20.47ns	17.0675	1.20	14.04ns
on_error	1.21ns	1.01155	1.20	20.21ns
on_completed	1.61ns	1.34241	1.20	1.62ns

publish_subject routines

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
construct	144.56ns	121.722	1.19	204.56ns
get_observable	5.76ns	4.81853	1.20	55.24ns
get_subscriber	14.94ns	12.4267	1.20	26.85ns

Windows MSVC

Observable construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable construction	2.08ns	1.50816	1.38	0.77ns
Dynamic observable construction	97.15ns	81.7138	1.19	150.38ns
Specific observable construction + as_dynamic	98.61ns	82.0129	1.20	185.15ns

Observable lift

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable lift specific observer	161.39ns	139.659	1.16	1442.89ns
Specific observable lift dynamic observer	233.54ns	169.046	1.38	1382.74ns
Dynamic observable lift specific observer	315.25ns	266.505	1.18	1712.18ns
Dynamic observable lift dynamic observer	323.45ns	287.325	1.13	1562.05ns

Observable subscribe

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable subscribe specific observer	103.60ns	106.571	0.97	1346.24ns
Specific observable subscribe dynamic observer	147.81ns	119.728	1.23	1669.33ns
Dynamic observable subscribe specific observer	270.50ns	219.983	1.23	1708.44ns
Dynamic observable subscribe dynamic observer	206.16ns	165.458	1.25	1579.35ns

Observable subscribe #2

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observable subscribe lambda	156.47ns	106.435	1.47	1462.56ns
Dynamic observable subscribe lambda	417.71ns	219.829	1.90	1771.47ns
Specific observable subscribe lambda without subscription	132.80ns	107.013	1.24	1425.05ns
Dynamic observable subscribe lambda without subscription	265.41ns	221.5	1.20	1665.94ns
Specific observable subscribe specific subscriber	21.15ns	17.0904	1.24	1054.93ns
Dynamic observable subscribe specific subscriber	148.47ns	133.451	1.11	1367.87ns
Specific observable subscribe dynamic observer	22.42ns	16.7434	1.34	1460.93ns
Dynamic observable subscribe dynamic observer	100.83ns	62.8333	1.60	1128.31ns

Observer construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observer construction	0.76ns	0.675451	1.13	1.97ns
Dynamic observer construction	174.65ns	81.3987	2.15	146.47ns
Specific observer construction + as_dynamic	102.05ns	81.9153	1.25	140.93ns

OnNext

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Specific observer OnNext	0.80ns	0.67222	1.19	0.92ns
Dynamic observer OnNext	2.63ns	2.01086	1.31	2.69ns

Operators

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
map construction from observable via dot + subscribe	206.79ns	77.5727	2.67	1182.23ns

Subscriber construction

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
Make subsriber	106.57ns	88.9825	1.20	424.00ns
Make copy of subscriber	21.53ns	16.7728	1.28	36.49ns
Transform subsriber to dynamic	126.28ns	96.8511	1.30	187.10ns

Subscription

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
composite_subscription create	107.28ns	88.2797	1.22	456.34ns
composite_subscription add	132.81ns	62.6774	2.12	86.88ns
composite_subscription unsubscribe	8.91ns	8.2859	1.08	28.49ns

foundamental sources

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
empty	19.89ns	16.7985	1.18	226.59ns
error	57.97ns	47.1109	1.23	298.73ns
never	24.28ns	16.7605	1.45	1080.66ns

from

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
from vector with int	142.13ns	84.3907	1.68	337.19ns

just

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
just send int	28.91ns	20.1591	1.43	235.70ns
just send variadic	25.18ns	20.6391	1.22	252.40ns

merge

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
merge	38.21ns	37.3018	1.02	805.90ns
merge_with	373.23ns	286.906	1.30	1938.24ns

publish_subject callbacks

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
on_next	28.93ns	20.226	1.43	37.03ns
on_error	3.13ns	3.13575	1.00	22.47ns
on_completed	3.22ns	2.37778	1.35	0.81ns

publish_subject routines

Table

Test Name	Current, ns	Prev, ns	Ratio	RxCpp current, ns
construct	350.84ns	288.933	1.21	744.59ns
get_observable	31.90ns	28.2007	1.13	173.44ns
get_subscriber	65.17ns	50.4306	1.29	111.17ns